Ruby Programming

Pragmatic Bookshelf

Programming Ruby 3.3: The Pragmatic Programmers Guide

O'Reilly

The Ruby Programming Language: Everything You Need to Know

Addison Wesley

Practical Object-Oriented Design: An Agile Primer Using Ruby

CompreQuest Books

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

Packt Publishing

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

Ruby For Beginners: Your Guide To Easily Learn Ruby Programming in 7 days (Programming Languages Book 9) (English Edition)

Independently published

Black Hat Ruby: Offensive Ruby programming for Hackers and Pentesters

APOGEO

Ruby                                            

Codemy.com

Intro To Ruby Programming: Beginners Guide Series

Quick Start Guide Object Oriented Pocket Reference By Examples Concurrency Teach Yourself Code Book

Ruby Programming Language, Real World Code & Explanations, 2 Books in 1, For Beginners, Ruby Programming Book: Ruby Object Oriented Programming, Ruby Meta ... Learn Ruby by Examples (English Edition)