Head First Rails: A Learners Companion to Ruby on Rails
Ruby on Rails for Php and Java Developers
Beginning Ruby: From Novice to Professional (Beginning from Novice to Professional)
《Ruby程序员修炼之道》David A. Black
Ruby Island: A New Zealand opposites attract romance. (Otago Waters Book 2)
Practical JRuby on Rails Web 2.0 projects: bringing Ruby on Rails to the Java platform