Listmania!
Ruby/Ruby on Rails
By an Amazon.com customer
Learning RubyLearning Ruby by Michael Fitzgerald Dr
Buy new: $23.09 / Used from: $1.68
Good solid intro to Ruby. I've read it several times.
Beginning Ruby: From Novice to Professional (Beginning from Novice to Professional)Beginning Ruby: From Novice to Professional (Beginning from Novice to Professional) by Peter Cooper
Buy new: $34.19 / Used from: $14.99
Another good book for beginners.
The Ruby Programming LanguageThe Ruby Programming Language by David Flanagan
Buy new: $26.39 / Used from: $8.68
Must have - covers Ruby 1.9. Essential Ruby book.
The Ruby Way, Second Edition: Solutions and Techniques in Ruby Programming (2nd Edition)The Ruby Way, Second Edition: Solutions and Techniques in Ruby Programming (2nd Edition) by Hal Fulton
Buy new: $31.49 / Used from: $17.50
Another must have.
Programming Ruby: The Pragmatic Programmers' Guide, Second EditionProgramming Ruby: The Pragmatic Programmers' Guide, Second Edition by Dave Thomas
Buy new: $20.71 / Used from: $3.70
A classic, but I'd get The Ruby Way and The Ruby Programming Language first.
Ruby Cookbook (Cookbooks (O'Reilly))Ruby Cookbook (Cookbooks (O'Reilly)) by Lucas Carlson
Buy new: $31.49 / Used from: $6.83
The Perl Cookbook is a great book from O'Reilly. I'm glad to say that O'Reilly has a winner to as well.
Learning RailsLearning Rails by Simon St Laurent
Buy new: $23.09 / Used from: $15.84
Good intro to Rails.
Simply Rails 2Simply Rails 2 by Patrick Lenz
Buy new: $26.37 / Used from: $17.29
A great beginning book on Rails. One of my favorites.
Agile Web Development with Rails, Third EditionAgile Web Development with Rails, Third Edition by Sam Ruby
Buy used from: $84.95
A classic, now covers Rails 2. Everyone starts with this book.
Foundation Rails 2Foundation Rails 2 by Eldon Alameda
Buy new: $28.37 / Used from: $8.57
The Rails WayThe Rails Way by Obie Fernandez
Buy new: $34.64 / Used from: $19.39
A must have...not an intro book, but definitely will deepen your knowledge or Rails once you've got a few project under your belt. Includes Rails 2.0 coverage.
Advanced RailsAdvanced Rails by Brad Ediger
Buy new: $23.09 / Used from: $3.54
Well written and very useful. Would put this in my top three favorite Rails books.
Enterprise RailsEnterprise Rails by Dan Chak
Buy new: $29.69 / Used from: $1.17
Rails Recipes (Pragmatic Programmers)Rails Recipes (Pragmatic Programmers) by Chad Fowler
Buy new: $21.75 / Used from: $3.90
Must have - it's a bit out of date, but filled with great recipes.
Advanced Rails RecipesAdvanced Rails Recipes by Mike Clark
Buy new: $25.71 / Used from: $20.94
Must have. Rails 2.
RailsSpace: Building a Social Networking Website with Ruby on Rails (Addison-Wesley Professional Ruby Series)RailsSpace: Building a Social Networking Website with Ruby on Rails (Addison-Wesley Professional Ruby Series) by Michael Hartl
Buy new: $31.49 / Used from: $16.45
I like the Addison-Wesley Ruby/Rails books. Pre-Rails 2.0, but I found this to be one of the best books to start with.
Rails Cookbook (Cookbooks (O'Reilly))Rails Cookbook (Cookbooks (O'Reilly)) by Rob Orsini
Buy new: $26.39 / Used from: $2.49
Another good recipe book. Rails 1.2.
Pro Active Record: Databases with Ruby and RailsPro Active Record: Databases with Ruby and Rails by Kevin Marshall
Buy new: $29.19 / Used from: $0.98
Mixed reviews - I found it to be a good beginners book (not pro) and a nice reference.
Restful Web ServicesRestful Web Services by Leonard Richardson
Buy new: $26.39 / Used from: $13.07
Highly recommended. Not Ruby/Rails specific (but does use Ruby for many examples).
Practical REST on Rails 2 Projects (Practical Projects)Practical REST on Rails 2 Projects (Practical Projects) by Ben Scofield
Buy new: $32.67 / Used from: $1.00
Good intro to Rails and REST.
Ajax on RailsAjax on Rails by Scott Raymond
Buy new: $26.39 / Used from: $3.91
The Art of Rails (Programmer to Programmer)The Art of Rails (Programmer to Programmer) by Edward Benson
Buy new: $26.39 / Used from: $4.95
Ruby Best PracticesRuby Best Practices by Gregory Brown
Buy new: $23.10 / Used from: $34.31
Ruby in PracticeRuby in Practice by Jeremy McAnally
Buy new: $26.39 / Used from: $15.36