Learning Rails 3: Rails from the Outside In

Selenium Design Patterns and Best Practices

Practical Ruby 3 Programming: Simpler than Python, offering concise syntax, reusable code, and maximum developer productivity

Metasploit, 2nd Edition

Learning Chef: A Guide to Configuration Management and Automation

Learning Rails 5: Rails from the Outside In

Rake Task Management Essentials

Mastering Elixir: Build and scale concurrent, distributed, and fault-tolerant applications

Test-Driven Infrastructure with Chef: Bring Behavior-Driven Development to Infrastructure as Code, Edition 2

Sinatra: Up and Running: Ruby for the Web, Simply

Continuous Delivery for Mobile with fastlane: Automating mobile application development and deployment for iOS and Android

Shopify Application Development

Instant RubyMine

Ruby Wizardry: An Introduction to Programming for Kids

Extending Puppet

The C++ Programming Language: Edition 4

Rails Cookbook: Recipes for Rapid Web Development with Ruby

Elixir Cookbook

The Book of Ruby: A Hands-On Guide for the Adventurous