Ruby Programming

O'Reilly Media

The Ruby Programming Language: Everything You Need to Know

Pragmatic Bookshelf

Programming Ruby 3.3: The Pragmatic Programmers Guide

Packt Publishing

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

Dark Neon

The Little Book Of Ruby Programming: Learn To Program Ruby For Beginners

Independently published

Ruby Programming: A Complete Guide to Mastering Basics And Advanced Concepts With Ease

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

Addison Wesley

Ruby Way, The: Solutions and Techniques in Ruby Programming

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

HIPSTERCELL

Ruby Programming Guide                          

CompreQuest Books

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