This book is a tutorial and reference for the ruby programming language. use ruby, and you'll write better code, be more productive, and enjoy programming more. the book is a guide to working with the object-oriented programming language, teaching the basics, plus how to write large programs, how to extend ruby using c code, and much more.

this is the html version of the "programming ruby" book by david thomas and andrew hunt, published by addison-wesley and graciously licensed under the open publication license.