diff --git a/built_in_extensions.rb b/built_in_extensions.rb
index 733a1b0..ea9af72 100644
--- a/built_in_extensions.rb
+++ b/built_in_extensions.rb
@@ -14,4 +14,5 @@ gem 'personal_diploma', git: 'git@gitlab.tp.rulingcom.com:saurabh/personal-diplo
 gem 'personal_honor', git: 'git@gitlab.tp.rulingcom.com:saurabh/personal-honor.git'
 gem 'personal_patent', git: 'git@gitlab.tp.rulingcom.com:saurabh/personal-patent.git'
 gem 'personal_project', git: 'git@gitlab.tp.rulingcom.com:saurabh/personal-project.git'
-gem 'personal_research', git: 'git@gitlab.tp.rulingcom.com:saurabh/personal-research.git'
\ No newline at end of file
+gem 'personal_research', git: 'git@gitlab.tp.rulingcom.com:saurabh/personal-research.git'
+gem 'personal_book', git: 'git@gitlab.tp.rulingcom.com:saurabh/personal-book.git'
\ No newline at end of file