MacRuby: The Definitive Guide
by Matt Aimonetti
Publisher: O'Reilly Media 2010
MacRuby is Apple's implementation of the Ruby programming Language which uses the well known and proven Objective-C runtime. This book is an introduction to MacRuby. Topics covered: Introduction, The Cocoa Environment, Foundation, Application Kit, Core Data, Xcode.
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Everything from installing Ruby and the basics of the language through to topics such as arrays, file handling and object-oriented programming are covered. Written both for experienced in other programming languages and for novices.
by Zed A. Shaw - LCodeTHW
The book assumes absolutely no prior programming knowledge and will guide you carefully and slowly through the learning process. When you are done with it you will have the skill to move on to other books about Ruby and be ready to understand them.
by Jeremy McAnally
Covers the Ruby language from the very basics to the advanced topics. Written in a conversational narrative rather than like a dry reference book, Mr. Neighborly's Humble Little Ruby Book is an easy to read, easy to follow guide to all things Ruby.
by Bruno R. Preiss
The primary goal of this book is to promote object-oriented design using Ruby and to illustrate the use of the emerging object-oriented design patterns. The book shows how these patterns are used to create good software designs.