Agile Web Development with Rails [PDF]
Programming Ruby [PDF]
Ruby for Rails Ruby Techniques for Rails Developers May 2006 [PDF]
Learn Ruby on Rails in 4 days [PDF]
Web Services on Rails [CHM]
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Rolling with Ruby on Rails - Part 1 [PDF]
Ruby on Rails - A high-productivity web application framework [PDF]
Rails Recipes [PDF]
Ruby in a Nutshell 2001 [PDF]