Ruby on Rails: Up and Running in print or PDF
Ruby on Rails: Up and Running – You can now buy this must-have book in our usual high-quality print format, or in a fully searchable and bookmarked PDF for 50% off the print book price. This compact guide from O’Reilly teaches you the basics of Ruby on Rails, the super-productive new way to develop full-featured web applications. Discover how to install and use both the Ruby scripting language and the Rails framework. More advanced material shows you just how fast Ruby on Rails can go.
http://www.oreilly.com/catalog/rubyrails/#top