Ruby Programming Language

O'Reilly

The Ruby Programming Language: Everything You Need to Know

Pragmatic Bookshelf

Programming Ruby 3.3: The Pragmatic Programmers Guide

Ruby Programming Language: A Concise Manual For Quickly Learning Ruby (English Edition)

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)

CompreQuest Books

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

Addison Wesley

Practical Object-Oriented Design: An Agile Primer Using Ruby

Addison-Wesley Professional

Eloquent Ruby [Lingua inglese]                  

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

Ruby Programming Language Manual: An Essential Guide To Learning Ruby (English Edition)

Programming

Programming: Programming (Japanese Edition)