Ruby Programming

Pragmatic Bookshelf

Programming Ruby 3.3: The Pragmatic Programmers Guide

Dark Neon

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

O'Reilly Media

The Ruby Programming Language: Everything You Need to Know

Independently published

Black Hat Ruby: Offensive Ruby programming for Hackers and Pentesters

Packt Publishing

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

HIPSTERCELL

Ruby Programming Guide                          

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

Ruby Programming Made Easy: A Complete Guide to Building Projects for Beginners and Beyond" (English Edition)

Independently published

Super Easy Ruby: Learn Ruby Programming for Begginer to Advanced

Brand: Pragmatic Bookshelf

Metaprogramming Ruby: Program Like the Ruby Pros