diff --git a/app/models/book.rb b/app/models/book.rb
index 17f6ed7..9791b4d 100644
--- a/app/models/book.rb
+++ b/app/models/book.rb
@@ -39,7 +39,7 @@ class Book
 
   before_validation :add_http
 
-  scope :sort_for_frontend, ->{ where(:is_hidden=>false).order_by(:year => "desc", :publish_date => "desc") }
+  scope :sort_for_frontend, ->{ where(:is_hidden=>false).order_by(:year => "desc", :publish_date => "desc", :publication_date => "desc") }
 
   def create_link
     title = []