Programming Ruby

Pragmatic Bookshelf

Programming Ruby 3.3: The Pragmatic Programmers Guide

O'Reilly Media

The Ruby Programming Language: Everything You Need to Know

O'Reilly UK Ltd.

Programming Ruby 1.9 & 2.0: The Pragmatic Programmers' Guide

Packt Publishing

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

APOGEO

Ruby                                            

No Starch Press

The Book of Ruby: A Hands-On Guide for the Adventurous

Pragmatic Bookshelf

Programming Ruby: The Pragmatic Programmer's Guide: xxxii

Ruby Programming Language: Comprehensive Ruby Programming Language Guidebook for Beginners and Advanced Learners (English Edition)

Ruby Programming: A Complete Guide to Mastering Basics And Advanced Concepts With Ease (English Edition)

Programming with Ruby: Modern Techniques and Best Practices (English Edition)