Programming Ruby

Pragmatic Bookshelf

Programming Ruby 3.3: The Pragmatic Programmers Guide

O'Reilly

The Ruby Programming Language: Everything You Need to Know

O'Reilly UK Ltd.

Programming Ruby 1.9 & 2.0: The Pragmatic Programmers' Guide

Addison Wesley

Practical Object-Oriented Design: An Agile Primer Using Ruby

Programming

Ruby: Programming (programmer) (Japanese Edition)

CompreQuest Books

Ruby Programming: Dynamic, Object-Oriented Language for Simplicity and Productivity (Mastering Programming Languages Series) (English Edition)

Ruby Programming: Basics to Advanced Concepts (English Edition)

Ruby: Learn Ruby in Two Hours: The Smart and Efficient Way to Learning Ruby Programming (English Edition)

HIPSTERCELL

Ruby Programming Guide                          

Packt Publishing

Polished Ruby Programming: Build better software with more intuitive, maintainable, scalable, and high-performance Ruby code