Text Processing with Ruby: Extract Value from the Data That Surrounds You

From Java to Ruby: Things Every Manager Should Know (Pragmatic Programmers)

Ruby Programming for Beginners: An Introduction to Learning Ruby Programming with Tutorials and Hands-On Examples

Enterprise Recipes with Ruby and Rails

RailsSpace: Building a Social Networking Website with Ruby on Rails (Addison-Wesley Professional Ruby Series)

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

Rails Recipes: Rails 3 Edition

Sass and Compass in Action

Elixir in Action

Agile Web Development with Rails 3.2