Mr. Neighborly's Humble Little Ruby Book

Jeremy McAnally
Format: pdf

This book covers the basic concepts of the Ruby language, including syntax, flow control, and object oriented programming. It also gets into some of the Ruby library functions, such as databases and web services.

Programming Ruby: A Pragmatic Programmer's Guide

Dave Thomas and Andy Hunt
Published: 2001, Addison Wesley Longman
~500 pages   Format: HTML

A guide to working with the object-oriented programming language, Ruby, which allows for programming without extra syntax or code. Shows how to easily mine the Ruby language, teaching the basics, plus how to write large programs, how to extend Ruby using C code, and more.

Ruby Cookbook

various authors
Published: , PLEAC Project
Format: HTML

An online book which implements the solutions from the Perl Cookbook in the Ruby language. The book is a work in progress.

Why's (Poignant) Guide to Ruby

Why the Lucky Stiff
Published: 2003,
Format: HTML

A thorough and entertaining introduction to the Ruby scripting language.