The Ruby Programming Language

This comprehensive guide to Ruby covers both version 1.8 and 1.9 and is written by an all-star team, including the creator of Ruby himself. With a quick-start tutorial and detailed explanations of the language's structure, datatypes, and more, this book is perfect for experienced programmers new to Ruby or those looking to increase their mastery of the language. Plus, it includes thorough introductions to Ruby's rich API and metaprogramming capabilities.