Rails 3 in a Nutshell, Cody Fauser, O’Reilly, 2010
A concise introduction to Rails, an overview of commands and configurations, and a guide to the parts of Rails you’ll be using every day. Read the book-in-progress online here. Sorry, it’s not yet at OPL.
Enterprise recipes with Ruby and Rails / Maik Schmidt, Pragmatic Bookshelf, 2008
Agile web development with Rails : a Pragmatic guide / Dave Thomas, Pragmatic Bookshelf, 2006