Programming Ruby: The Pragmatic Programmers' Guide, Second Edition

Practical Ruby for System Administration (Expert's Voice in Open Source)

Mastering Magento Theme Design

Rails 5 Way, The (Addison-Wesley Professional Ruby Series)

Shopify Application Development: Build Highly Effective Shopify Apps Using the Powerful Ruby on Rails Framework

Agile Web Development with Rails 5.1

Game Programming with Python, Lua, and Ruby (Game Development)

Hands-on Test-Driven Development: Using Ruby, Ruby on Rails, and RSpec

Crafting Rails 4 Applications: Expert Practices for Everyday Rails Development (The Facets of Ruby)

Ruby on Rails 5.0 for Autodidacts: Learn Ruby 2.3 and Rails 5.0