Pro Rails 4

Pro Rails 4 takes you to the next level as a Rails developer. It covers the new advanced features of Rails 4, including: ActiveSupport:Concerns, Russian doll caching, ActionController:Live, and more. It covers common gems that professionals use to build polished Rails applications. It also covers advanced testing techniques such as mocking and factories.
This book is well suited for a Rails developer who knows how to build basic applications, butwants to build professional Ruby on Rails applications. It assumes you have a grasp of the basic Rails framework as well as Ruby.
Pro Rails 4 dives right into development, you wont waste time installing Ruby or Rails. After completing this book you will have a firm grasp of the Rails framework and be ready to build polished Rails applications.