Ruby Programming

Go in Action

Practical Object-Oriented Design: An Agile Primer Using Ruby

Intro To Ruby Programming: Beginners Guide Series

Metasploit, 2nd Edition

Modular Rails: Architecture for the Long Game: A practical guide to building maintainable Ruby on Rails applications using Rails Engines

Eloquent Ruby

Rails Scales!: Practical Techniques for Performance and Growth

Metaprogramming Ruby 2: Program Like the Ruby Pros