diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index cb441a3..43a1c92 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -8,6 +8,7 @@
         <option name="distributionType" value="DEFAULT_WRAPPED" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
         <option name="gradleHome" value="$PROJECT_DIR$/../../Gradle/gradle-7.4.2" />
+        <option name="gradleJvm" value="11" />
         <option name="modules">
           <set>
             <option value="$PROJECT_DIR$" />
diff --git a/.idea/misc.xml b/.idea/misc.xml
index bdd9278..8a567c4 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,7 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="ExternalStorageConfigurationManager" enabled="true" />
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_11" default="true" project-jdk-name="Android Studio default JDK" project-jdk-type="JavaSDK">
+  <component name="FrameworkDetectionExcludesConfiguration">
+    <file type="web" url="file://$PROJECT_DIR$" />
+  </component>
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_11" default="true" project-jdk-name="11" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">
diff --git a/app/build.gradle b/app/build.gradle
index 43c84c1..44f8409 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -32,6 +32,7 @@ android {
     }
 }
 
+
 dependencies {
 
     implementation 'androidx.appcompat:appcompat:1.5.1'
@@ -40,6 +41,7 @@ dependencies {
     implementation 'androidx.annotation:annotation:1.3.0'
     implementation 'androidx.lifecycle:lifecycle-livedata-ktx:2.4.1'
     implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.4.1'
+    implementation 'androidx.legacy:legacy-support-v4:1.0.0'
     testImplementation 'junit:junit:4.13.2'
     androidTestImplementation 'androidx.test.ext:junit:1.1.5'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'
@@ -53,4 +55,13 @@ dependencies {
     //Glide 가져오기
     implementation 'com.github.bumptech.glide:glide:4.11.0'
     annotationProcessor 'com.github.bumptech.glide:compiler:4.11.0'
+
+    //volley
+    implementation 'com.android.volley:volley:1.2.1'
+
+    //OCR
+    implementation 'com.rmtheis:tess-two:5.4.1'
+
+    //firebase Storage
+    implementation 'com.google.firebase:firebase-storage'
 }
\ No newline at end of file
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index ca711a2..5952446 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -1,8 +1,13 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools">
-
-    <uses-permission android:name="android.permission.INTERNET" />
+    <!-- 인터넷 권한 설정 -->
+    <uses-permission android:name="android.permission.INTERNET" /> <!-- 인터넷 연결 확인 -->
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <!-- 카메라 -->
+    <uses-permission android:name="android.permission.CAMERA" />
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.READ_CONTACTS" />
 
     <application
         android:allowBackup="true"
@@ -13,20 +18,58 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/Theme.Bookshelf"
+        android:usesCleartextTraffic="true"
         tools:targetApi="31">
         <activity
-            android:name=".ui.login.LoginActivity"
+            android:name=".user.UserProfileActivity"
+            android:exported="false">
+            <meta-data
+                android:name="android.app.lib_name"
+                android:value="" />
+        </activity>
+
+        <provider
+            android:name="androidx.core.content.FileProvider"
+            android:authorities="org.techtown.bookshelf"
             android:exported="false"
-            android:label="@string/title_activity_login" />
+            android:grantUriPermissions="true">
+            <meta-data
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/filepaths" />
+        </provider>
+
+        <activity
+            android:name=".camera.CameraActivity"
+            android:exported="false">
+            <meta-data
+                android:name="android.app.lib_name"
+                android:value="" />
+        </activity>
+        <activity
+            android:name=".friend.SearchFriendActivity"
+            android:exported="false">
+            <meta-data
+                android:name="android.app.lib_name"
+                android:value="" />
+        </activity>
+        <activity
+            android:name=".friend.FriendListActivity"
+            android:exported="false">
+            <meta-data
+                android:name="android.app.lib_name"
+                android:value="" />
+        </activity>
+        <activity android:name=".login.RegisterActivity" />
+        <activity android:name=".user.MainActivity" />
         <activity
-            android:name=".BookSearchActivity"
+            android:name=".book.search.BookSearchActivity"
             android:exported="false">
             <meta-data
                 android:name="android.app.lib_name"
                 android:value="" />
         </activity>
         <activity
-            android:name=".MainActivity"
+            android:name=".login.LoginActivity"
             android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
diff --git a/app/src/main/java/org/techtown/bookshelf/Book.java b/app/src/main/java/org/techtown/bookshelf/Book.java
deleted file mode 100644
index 9d78dc6..0000000
--- a/app/src/main/java/org/techtown/bookshelf/Book.java
+++ /dev/null
@@ -1,68 +0,0 @@
-package org.techtown.bookshelf;
-
-public class Book{
-    private String push;
-    private String title;
-    private String author;
-    private String publisher;
-    private String genre;
-    private String bookimage_address="";
-
-    public Book(String push, String title, String author, String publisher, String genre, String bookimage_address) {
-        this.push = push;
-        this.title = title;
-        this.author = author;
-        this.publisher = publisher;
-        this.genre = genre;
-        this.bookimage_address = bookimage_address;
-    }
-
-    public String getBookimage_address() {
-        return bookimage_address;
-    }
-
-    public void setBookimage_address(String bookimage_address) {
-        this.bookimage_address = bookimage_address;
-    }
-
-
-    public String getPush() {
-        return push;
-    }
-
-    public void setPush(String push) {
-        this.push = push;
-    }
-
-    public String getTitle() {
-        return title;
-    }
-
-    public void setTitle(String title) {
-        this.title = title;
-    }
-
-    public String getAuthor() {
-        return author;
-    }
-
-    public void setAuthor(String author) {
-        this.author = author;
-    }
-
-    public String getPublisher() {
-        return publisher;
-    }
-
-    public void setPublisher(String publisher) {
-        this.publisher = publisher;
-    }
-
-    public String getGenre() {
-        return genre;
-    }
-
-    public void setGenre(String genre) {
-        this.genre = genre;
-    }
-}
diff --git a/app/src/main/java/org/techtown/bookshelf/BookAdapter.java b/app/src/main/java/org/techtown/bookshelf/BookAdapter.java
deleted file mode 100644
index f06ab7d..0000000
--- a/app/src/main/java/org/techtown/bookshelf/BookAdapter.java
+++ /dev/null
@@ -1,90 +0,0 @@
-package org.techtown.bookshelf;
-
-import android.app.Activity;
-import android.content.Context;
-import android.content.Intent;
-import android.util.Log;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-import android.widget.BaseAdapter;
-import android.widget.Button;
-import android.widget.ImageView;
-import android.widget.TextView;
-
-import com.bumptech.glide.Glide;
-import com.google.firebase.database.DatabaseReference;
-import com.google.firebase.database.FirebaseDatabase;
-
-import java.io.Serializable;
-import java.util.ArrayList;
-
-public class BookAdapter extends BaseAdapter  {
-    ArrayList<Book> items = new ArrayList<Book>();
-    private Context context;
-
-
-    
-    //파이어베이스 가져오기
-    DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference("book");;
-
-    @Override
-    public int getCount() {
-        return items.size();
-    }
-
-    @Override
-    public Object getItem(int position) {
-        return items.get(position);
-    }
-
-    @Override
-    public long getItemId(int position) {
-        return position;
-    }
-
-    @Override
-    public View getView(int position, View convertView, ViewGroup parent) {
-        context = parent.getContext();
-        Book book = items.get(position);
-
-        if(convertView == null){
-            LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
-            convertView = inflater.inflate(R.layout.item_book, parent, false);
-        }
-
-        //리스트뷰에 데이터 뿌리는 작업 :ㅇ
-        ImageView bookimage = convertView.findViewById(R.id.bookimage);
-        TextView title = convertView.findViewById(R.id.title);
-        TextView author = convertView.findViewById(R.id.author);
-        TextView publisher = convertView.findViewById(R.id.publisher);
-        TextView genre = convertView.findViewById(R.id.genre);
-        Button choice_btn=convertView.findViewById(R.id.choice_btn);
-
-        if(book.getBookimage_address()!="") {
-            Glide.with(convertView)
-                    .load(book.getBookimage_address())
-                    .placeholder(R.drawable.icon_search)
-                    .error(R.drawable.ic_launcher_foreground)
-                    .into(bookimage);
-        }
-
-        title.setText(book.getTitle());
-        author.setText(book.getAuthor());
-        publisher.setText(book.getPublisher());
-        genre.setText(book.getGenre());
-        //유저가 선택 버튼을 누르면 transmit_push_to_main()
-        choice_btn.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View v) {
-                ((BookSearchActivity)BookSearchActivity.mContext).transmit_push_to_main(position);
-            }
-        });
-
-        return convertView;
-    }
-
-    public void addItem(Book item){
-        items.add(item);
-    }
-}
diff --git a/app/src/main/java/org/techtown/bookshelf/BookSearchActivity.java b/app/src/main/java/org/techtown/bookshelf/BookSearchActivity.java
deleted file mode 100644
index 4475cae..0000000
--- a/app/src/main/java/org/techtown/bookshelf/BookSearchActivity.java
+++ /dev/null
@@ -1,119 +0,0 @@
-package org.techtown.bookshelf;
-
-import androidx.annotation.NonNull;
-import androidx.appcompat.app.AppCompatActivity;
-
-import android.content.Context;
-import android.content.Intent;
-import android.os.Bundle;
-import android.util.Log;
-import android.widget.ListView;
-import android.widget.Toast;
-
-import com.google.android.gms.tasks.OnFailureListener;
-import com.google.android.gms.tasks.OnSuccessListener;
-import com.google.firebase.database.DataSnapshot;
-import com.google.firebase.database.DatabaseError;
-import com.google.firebase.database.DatabaseReference;
-import com.google.firebase.database.FirebaseDatabase;
-import com.google.firebase.database.ValueEventListener;
-
-public class BookSearchActivity extends AppCompatActivity {
-    //Firebase DB 가져오기
-    private DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference("book");
-
-    public static Context mContext;
-    public String a;
-
-    ListView bookListView;
-    BookAdapter bookAdapter;
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_book_search);
-
-        /*
-        writeBookData("데일 카네기 인간관계론", "데일 카네기", "현대지성", "자기계발", "http://image.yes24.com/goods/79297023/L");
-        writeBookData("아몬드", "손원평", "창비", "소설", "https://image.yes24.com/goods/37300128/L");
-        writeBookData("언어의 온도", "이기주", "말글터", "에세이", "http://image.yes24.com/goods/30387696/L");
-         */
-        bookListView=findViewById(R.id.bookListView);
-        bookAdapter=new BookAdapter();
-        bookListView.setAdapter(bookAdapter);
-
-        readBookData();
-
-        mContext=this;
-
-
-        Intent intent_position = getIntent();
-        if(intent_position.getStringExtra("book_position") != null) {
-            int book_position = Integer.valueOf(intent_position.getStringExtra("book_position"));
-            Book book = (Book) bookAdapter.getItem(book_position);
-            Log.e("bookdata", "데이터를 받아와써용"+book_position);
-        }
-
-
-    }
-
-
-    //DB에 데이터 쓰기(클래스로 저장되는게 아니라 String으로 저장됨!!)
-    private void writeBookData(String title, String author, String publisher, String genre, String bookimage_address) {
-        String push = databaseReference.push().getKey();
-        Book book = new Book(push, title, author, publisher, genre, bookimage_address);
-        databaseReference.child(push).setValue(book)
-                .addOnSuccessListener(new OnSuccessListener<Void>() {
-                    @Override
-                    public void onSuccess(Void aVoid) {
-                        // Write was successful
-                        //bread.setBread_push(bread_push);
-                        Toast.makeText(BookSearchActivity.this, "저장을 완료했습니다. push:"+push, Toast.LENGTH_SHORT).show();
-                    }
-                })
-                .addOnFailureListener(new OnFailureListener() {
-                    @Override
-                    public void onFailure(@NonNull Exception e) {
-                        // Write failed
-                        Toast.makeText(BookSearchActivity.this, "저장을 실패했습니다.", Toast.LENGTH_SHORT).show();
-                    }
-                });
-    }
-
-    //DB에서 getValue()로 데이터 받아오기
-    private void readBookData(){
-        databaseReference.addValueEventListener(new ValueEventListener() {
-            @Override
-            public void onDataChange(@NonNull DataSnapshot snapshot) {
-                bookAdapter.items.clear();
-                for (DataSnapshot dataSnapshot : snapshot.getChildren()) {
-                    String push = dataSnapshot.getKey();
-                    String title = dataSnapshot.child("title").getValue().toString();
-                    String author = dataSnapshot.child("author").getValue().toString();
-                    String publisher = dataSnapshot.child("publisher").getValue().toString();
-                    String genre = dataSnapshot.child("genre").getValue().toString();
-                    String image_address = dataSnapshot.child("bookimage_address").getValue().toString();
-
-                    Book book = new Book(push, title, author, publisher, genre, image_address);
-                    bookAdapter.addItem(book);
-                }
-                bookAdapter.notifyDataSetChanged();
-            }
-            @Override
-            public void onCancelled(@NonNull DatabaseError error) {
-                Log.e("Warning!! : ", "데이터를 받아오는 데에 실패했습니다!");
-            }
-        });
-    }
-
-    //Main액티비티로 책 푸시값 넘겨주고 BookSerach액티비티 종료하기
-    public void transmit_push_to_main(int position){
-        //mainactivity로 전환(책푸시값 넘겨주기)
-        String book_push = ((Book)bookAdapter.getItem(position)).getPush();
-        Intent intent = new Intent();
-        intent.putExtra("book_push", book_push);
-        setResult(RESULT_OK, intent);
-
-        finish();
-    }
-
-}
\ No newline at end of file
diff --git a/app/src/main/java/org/techtown/bookshelf/MainActivity.java b/app/src/main/java/org/techtown/bookshelf/MainActivity.java
deleted file mode 100644
index efbae8f..0000000
--- a/app/src/main/java/org/techtown/bookshelf/MainActivity.java
+++ /dev/null
@@ -1,54 +0,0 @@
-package org.techtown.bookshelf;
-
-import androidx.annotation.Nullable;
-import androidx.appcompat.app.AppCompatActivity;
-
-import android.content.Intent;
-import android.os.Bundle;
-import android.view.View;
-import android.widget.Button;
-import android.widget.EditText;
-import android.widget.Toast;
-
-import com.google.firebase.database.DatabaseReference;
-import com.google.firebase.database.FirebaseDatabase;
-
-public class MainActivity extends AppCompatActivity {
-    //Firebase DB 가져오기
-    private DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference();
-
-    EditText book_search_et;
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_main);
-
-        book_search_et = (EditText)findViewById(R.id.book_search);
-        book_search_et.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View v) {
-                Intent intent = new Intent(getApplicationContext(), BookSearchActivity.class);
-                startActivityForResult(intent, 0);
-
-
-            }
-        });
-
-
-
-    }
-
-    @Override
-    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
-        super.onActivityResult(requestCode, resultCode, data);
-
-        //data.getStringExtra("email")
-        //requestCode : activity 식별값
-
-        if(requestCode==0 && resultCode==RESULT_OK){
-            Toast.makeText(MainActivity.this, data.getStringExtra("book_push"), Toast.LENGTH_SHORT).show();
-        }else{
-            Toast.makeText(MainActivity.this, "result cancle!", Toast.LENGTH_SHORT).show();
-        }
-    }
-}
\ No newline at end of file
diff --git a/app/src/main/res/drawable/book2.png b/app/src/main/res/drawable/book2.png
index f843b01..6c1eeae 100644
Binary files a/app/src/main/res/drawable/book2.png and b/app/src/main/res/drawable/book2.png differ
diff --git a/app/src/main/res/drawable/layout_background.xml b/app/src/main/res/drawable/layout_background.xml
index f101380..82b4c3c 100644
--- a/app/src/main/res/drawable/layout_background.xml
+++ b/app/src/main/res/drawable/layout_background.xml
@@ -2,5 +2,5 @@
 <shape xmlns:android="http://schemas.android.com/apk/res/android"
     android:shape="rectangle">
     <solid android:color="#FFFFFFFF"/>
-    <corners android:radius="10dp"/>
+    <corners android:radius="15dp"/>
 </shape>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_book_search.xml b/app/src/main/res/layout/activity_book_search.xml
index af9f38b..f13b254 100644
--- a/app/src/main/res/layout/activity_book_search.xml
+++ b/app/src/main/res/layout/activity_book_search.xml
@@ -2,28 +2,54 @@
 <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/linearLayout2"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:background="#FFFFFF"
-    tools:context=".BookSearchActivity">
+    tools:context=".book.search.BookSearchActivity">
+
+    <TextView
+        android:id="@+id/textView8"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:fontFamily="@font/gangwon_bold"
+        android:text="책 찾기"
+        android:textSize="25dp"
+        app:layout_constraintBottom_toBottomOf="@+id/back_IV"
+        app:layout_constraintStart_toEndOf="@+id/back_IV"
+        app:layout_constraintTop_toTopOf="@+id/back_IV" />
+
+    <ImageView
+        android:id="@+id/back_IV"
+        android:layout_width="40dp"
+        android:layout_height="40dp"
+        android:layout_marginStart="5dp"
+        android:layout_marginTop="5dp"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:srcCompat="@drawable/back_icon" />
 
     <EditText
         android:id="@+id/book_search2"
-        android:layout_width="wrap_content"
+        android:layout_width="0dp"
         android:layout_height="wrap_content"
-        android:layout_marginTop="4dp"
         android:ems="10"
+        android:fontFamily="@font/gangwon_light"
         android:hint="책 검색하기"
         android:inputType="textPersonName"
+        android:textSize="25dp"
+        app:layout_constraintBottom_toTopOf="@+id/bookRecyclerView"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.0"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/back_IV" />
+
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/bookRecyclerView"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintHorizontal_bias="0.323"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
+        app:layout_constraintTop_toBottomOf="@+id/book_search2" />
 
-    <ListView
-        android:id="@+id/bookListView"
-        android:layout_width="409dp"
-        android:layout_height="680dp"
-        tools:layout_editor_absoluteX="1dp"
-        tools:layout_editor_absoluteY="50dp" />
 </androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index f43cfc2..ec7f18f 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -1,64 +1,109 @@
 <?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:background="#C3CCBB"
-    tools:context=".MainActivity">
-
-    <EditText
-        android:id="@+id/book_search"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:ems="10"
-        android:hint="책 검색하기"
-        android:inputType="textPersonName"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintHorizontal_bias="0.0"
-        app:layout_constraintStart_toEndOf="@+id/imageView"
-        app:layout_constraintTop_toTopOf="parent" />
-
-    <ImageView
-        android:id="@+id/imageView"
-        android:layout_width="37dp"
-        android:layout_height="45dp"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent"
-        app:srcCompat="@drawable/icon_search" />
-
-    <androidx.constraintlayout.widget.ConstraintLayout
-        android:layout_width="390dp"
-        android:layout_height="160dp"
-        android:layout_marginTop="78dp"
-        android:background="@drawable/layout_background"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintHorizontal_bias="0.473"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/book_search">
+    android:orientation="vertical"
+    tools:context=".user.MainActivity">
+
+    <LinearLayout
+        android:id="@+id/main_bar"
+        android:layout_width="match_parent"
+        android:layout_height="40dp"
+        android:layout_marginLeft="5dp"
+        android:layout_marginTop="5dp"
+        android:layout_marginRight="5dp"
+        android:orientation="horizontal">
 
         <ImageView
-            android:id="@+id/imageView3"
+            android:id="@+id/imageView"
+            android:layout_width="40dp"
+            android:layout_height="40dp"
+            app:srcCompat="@drawable/green_tea1" />
+
+        <TextView
+            android:id="@+id/textView3"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            app:layout_constraintBottom_toBottomOf="parent"
-            app:layout_constraintEnd_toEndOf="parent"
-            app:layout_constraintHorizontal_bias="0.0"
-            app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toTopOf="parent"
-            app:layout_constraintVertical_bias="0.90999997"
-            app:srcCompat="@drawable/sunban" />
+            android:layout_gravity="top"
+            android:fontFamily="@font/jejudoldam"
+            android:text="BOOKSHELF"
+            android:textColor="#486047"
+            android:textSize="25dp" />
+
+        <View
+            android:layout_width="0dp"
+            android:layout_height="0dp"
+            android:layout_weight="1" />
 
         <ImageView
-            android:id="@+id/bookIV1"
-            android:layout_width="25dp"
-            android:layout_height="94dp"
-            android:layout_marginStart="32dp"
-            app:layout_constraintBottom_toBottomOf="parent"
-            app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toTopOf="parent"
-            app:srcCompat="@drawable/book" />
-
-    </androidx.constraintlayout.widget.ConstraintLayout>
-
-</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
+            android:id="@+id/add_book"
+            android:layout_width="40dp"
+            android:layout_height="match_parent"
+            android:layout_gravity="center|right"
+            android:layout_marginRight="10dp"
+            app:srcCompat="@drawable/add_book" />
+
+    </LinearLayout>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="70dp"
+        android:layout_marginLeft="5dp"
+        android:layout_marginRight="5dp"
+        android:background="@drawable/layout_background"
+        android:orientation="horizontal">
+
+        <LinearLayout
+            android:id="@+id/myprofile"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            android:layout_margin="3dp"
+            android:orientation="vertical">
+
+        </LinearLayout>
+
+        <androidx.recyclerview.widget.RecyclerView
+            android:id="@+id/friendRecyclerView"
+            android:layout_width="wrap_content"
+            android:layout_height="match_parent"
+            android:layout_gravity="center"
+            android:layout_marginLeft="3dp"
+            android:layout_weight="10"
+            android:scrollbars="horizontal" />
+
+        <ImageView
+            android:id="@+id/menu_burger"
+            android:layout_width="40dp"
+            android:layout_height="match_parent"
+            android:layout_gravity="center"
+            android:layout_margin="3dp"
+            app:srcCompat="@drawable/friend" />
+
+        <ImageView
+            android:id="@+id/add_friend"
+            android:layout_width="40dp"
+            android:layout_height="match_parent"
+            android:layout_gravity="center|right"
+            android:layout_margin="3dp"
+            app:srcCompat="@drawable/plus" />
+
+    </LinearLayout>
+
+    <androidx.core.widget.NestedScrollView
+        android:id="@+id/mainScrollView"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_margin="5dp">
+
+        <FrameLayout
+            android:id="@+id/frame_bookshelf"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent">
+        </FrameLayout>
+    </androidx.core.widget.NestedScrollView>
+
+</LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/item_book.xml b/app/src/main/res/layout/item_book.xml
deleted file mode 100644
index 981fc2a..0000000
--- a/app/src/main/res/layout/item_book.xml
+++ /dev/null
@@ -1,82 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:layout_width="match_parent"
-    android:layout_height="wrap_content"
-    android:background="#FFE4C4">
-
-    <LinearLayout
-        android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        android:layout_margin="5dp"
-        android:background="#D4A061"
-        android:orientation="horizontal">
-
-        <ImageView
-            android:id="@+id/bookimage"
-            android:layout_width="100dp"
-            android:layout_height="100dp"
-            android:layout_margin="5dp"
-            tools:srcCompat="@drawable/ic_launcher_foreground" />
-
-        <LinearLayout
-            android:layout_width="match_parent"
-            android:layout_height="match_parent"
-            android:layout_weight="1"
-            android:orientation="vertical">
-
-            <LinearLayout
-                android:layout_width="match_parent"
-                android:layout_height="wrap_content"
-                android:orientation="horizontal">
-
-                <TextView
-                    android:id="@+id/title"
-                    android:layout_width="wrap_content"
-                    android:layout_height="wrap_content"
-                    android:layout_gravity="center|left"
-                    android:text="책 이름"
-                    android:textColor="#000000"
-                    android:textColorHint="#000000"
-                    android:textSize="20dp"
-                    android:textStyle="bold" />
-
-                <Button
-                    android:id="@+id/choice_btn"
-                    android:layout_width="wrap_content"
-                    android:layout_height="wrap_content"
-                    android:text="선택" />
-
-            </LinearLayout>
-
-            <TextView
-                android:id="@+id/author"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:layout_weight="1"
-                android:text="저자"
-                android:textColor="#FFFFFF"
-                android:textColorHint="#000000"
-                android:textSize="14dp" />
-
-            <TextView
-                android:id="@+id/publisher"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:layout_weight="1"
-                android:text="출판사"
-                android:textColor="#FFFFFF"
-                android:textSize="14dp" />
-
-            <TextView
-                android:id="@+id/genre"
-                android:layout_width="match_parent"
-                android:layout_height="wrap_content"
-                android:text="장르" />
-
-        </LinearLayout>
-
-    </LinearLayout>
-
-</LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/values-night/themes.xml b/app/src/main/res/values-night/themes.xml
index e929c02..01d35de 100644
--- a/app/src/main/res/values-night/themes.xml
+++ b/app/src/main/res/values-night/themes.xml
@@ -1,16 +1,18 @@
 <resources xmlns:tools="http://schemas.android.com/tools">
     <!-- Base application theme. -->
-    <style name="Theme.Bookshelf" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
+    <style name="Theme.Bookshelf" parent="Theme.MaterialComponents.Light.NoActionBar">
         <!-- Primary brand color. -->
-        <item name="colorPrimary">@color/purple_200</item>
-        <item name="colorPrimaryVariant">@color/purple_700</item>
+        <item name="colorPrimary">@color/appColorLightGreen</item>
+        <item name="colorPrimaryVariant">@color/appColorLightGreen</item>
         <item name="colorOnPrimary">@color/black</item>
         <!-- Secondary brand color. -->
         <item name="colorSecondary">@color/teal_200</item>
-        <item name="colorSecondaryVariant">@color/teal_200</item>
+        <item name="colorSecondaryVariant">@color/teal_700</item>
         <item name="colorOnSecondary">@color/black</item>
         <!-- Status bar color. -->
         <item name="android:statusBarColor">?attr/colorPrimaryVariant</item>
         <!-- Customize your theme here. -->
+        <item name="windowNoTitle">true</item>
+        <item name="android:windowBackground">@color/appColorLightGreen</item>
     </style>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 153165d..0ebde37 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -5,8 +5,10 @@
     <string name="prompt_password">Password</string>
     <string name="action_sign_in">Sign in or register</string>
     <string name="action_sign_in_short">Sign in</string>
-    <string name="welcome">"Welcome !"</string>
+    <string name="welcome">"Welcome"</string>
     <string name="invalid_username">Not a valid username</string>
     <string name="invalid_password">Password must be >5 characters</string>
     <string name="login_failed">"Login failed"</string>
+    <!-- TODO: Remove or change this placeholder text -->
+    <string name="hello_blank_fragment">Hello blank fragment</string>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/themes.xml b/app/src/main/res/values/themes.xml
index e99f88b..01d35de 100644
--- a/app/src/main/res/values/themes.xml
+++ b/app/src/main/res/values/themes.xml
@@ -1,10 +1,10 @@
 <resources xmlns:tools="http://schemas.android.com/tools">
     <!-- Base application theme. -->
-    <style name="Theme.Bookshelf" parent="Theme.MaterialComponents.DayNight">
+    <style name="Theme.Bookshelf" parent="Theme.MaterialComponents.Light.NoActionBar">
         <!-- Primary brand color. -->
-        <item name="colorPrimary">@color/purple_500</item>
-        <item name="colorPrimaryVariant">@color/purple_700</item>
-        <item name="colorOnPrimary">@color/white</item>
+        <item name="colorPrimary">@color/appColorLightGreen</item>
+        <item name="colorPrimaryVariant">@color/appColorLightGreen</item>
+        <item name="colorOnPrimary">@color/black</item>
         <!-- Secondary brand color. -->
         <item name="colorSecondary">@color/teal_200</item>
         <item name="colorSecondaryVariant">@color/teal_700</item>
@@ -12,5 +12,7 @@
         <!-- Status bar color. -->
         <item name="android:statusBarColor">?attr/colorPrimaryVariant</item>
         <!-- Customize your theme here. -->
+        <item name="windowNoTitle">true</item>
+        <item name="android:windowBackground">@color/appColorLightGreen</item>
     </style>
 </resources>
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
index 8c75629..451addf 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,5 +1,6 @@
 buildscript {
     dependencies {
+
         classpath 'com.google.gms:google-services:4.3.14'
     }
 }// Top-level build file where you can add configuration options common to all sub-projects/modules.
diff --git a/settings.gradle b/settings.gradle
index 84653ba..a85c56d 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -3,6 +3,7 @@ pluginManagement {
         gradlePluginPortal()
         google()
         mavenCentral()
+        maven { url 'https://jitpack.io'}
     }
 }
 dependencyResolutionManagement {