diff --git a/CHANGELOG b/CHANGELOG
new file mode 100644
index 0000000..48ac22c
--- /dev/null
+++ b/CHANGELOG
@@ -0,0 +1,3 @@
+## [0.1.0] - 2017-02-20
+### Added
+* Add contact sorter code
diff --git a/phonebook.py b/phonebook.py
index 254d86b..2113e8a 100644
--- a/phonebook.py
+++ b/phonebook.py
@@ -1,10 +1,23 @@
 #Import Python modules for handling csv
 import sys
 import csv
+import os
 
 #Open phonebook.csv file
 myfile = csv.reader(open("phonebook.csv", 'rU'), delimiter=",", dialect=csv.excel_tab)
 
 #Return information from file
+contacts = []
+header = next(myfile)
 for first_name, last_name, phone1 in myfile:
-    print first_name
\ No newline at end of file
+   contacts.append((first_name, last_name, phone1))
+
+sorted_by_last = sorted(contacts, key=lambda tup: tup[1])
+
+print sorted_by_last
+
+with open('output.csv','w') as out:
+   csv_out=csv.writer(out)
+   csv_out.writerow(header)
+   for row in sorted_by_last:
+       csv_out.writerow(row)
\ No newline at end of file