These are the new guides for Rails 3.2 based on v3.2.6 . These guides are designed to make you immediately productive with Rails, and to help you understand how all of the pieces fit together. The guides for Rails 2.3.x are available at http://guides.rubyonrails.org/v2.3.11/ . Rails Guides are also available for the Kindle and Free Kindle Reading Apps for the iPad, iPhone, Mac, Android, etc. Download them from here . Guides marked with this icon are currently being worked on. While they might still be useful to you, they may contain incomplete information and even errors. You can help by reviewing them and posting your comments and corrections to the author.