Books for Implementing Restful Architecture in Ruby on Rails
Please let me know the best books available for Implementing Restful Architecture in Ruby on Rails.

 1. Would like to know about the various Authentication process other than Basic Authentication and OAuth.
 2. Would like to know any gem available which can help me to request multiple Api's simultaneously, to that I can save time while waiting sequence of Api requests to other server.

Books for Implementing Restful Architecture in Ruby on Rails
===

Please let me know the best books available for Implementing Restful Architecture in Ruby on Rails.

 1. Would like to know about the various Authentication process other than Basic Authentication and OAuth.
 2. Would like to know any gem available which can help me to request multiple Api's simultaneously, to that I can save time while waiting sequence of Api requests to other server.
