TOP #1
TOP #4
TOP #5
TOP #7

The Rails Way

Obie Fernandez
TOP #9

Agile Web Development with Rails 3.2 (Pragmatic Programmers)

Sam Ruby, Dave Thomas, David Heinemeier Hansson
TOP #11

The RSpec Book: Behaviour Driven Development with RSpec, Cucumber, and Friends (Facets of Ruby)

David Chelimsky, Dave Astels, Bryan Helmkamp, Dan North, Zach Dennis, Aslak Hellesoy
TOP #13

Agile Web Development with Rails, Third Edition

Sam Ruby, Dave Thomas, David Heinemeier Hansson
TOP #14
TOP #19