The Well-Grounded Rubyist

Eloquent Ruby (Addison-Wesley Professional Ruby Series)

Russ Olsen

amazon.com
Cover of Eloquent Ruby (Addison-Wesley Professional Ruby Series)

The Pragmatic Programmer

David Thomas

amazon.com
Cover of The Pragmatic Programmer

Practical Object-Oriented Design in Ruby: An Agile Primer (Addison-Wesley Professional Ruby Series)

Sandi Metz

amazon.com
Cover of Practical Object-Oriented Design in Ruby: An Agile Primer (Addison-Wesley Professional Ruby Series)