Author Aaron Hillegass teaches a Cocoa class, and his book reads like a demonstration-driven lecture in a computer lab. That is, the book takes a heavily example-centric approach to its subject, beginning with simple announcement windows and proceeding to cover the more advanced controls and object-oriented features of Cocoa and Objective-C. Throughout, he hops back and forth between descriptions of the goal to be accomplished, listings of the code that does the job, and instructions on how to use the Mac OS X development tools to speed the development process. --David Wall

Topics covered: How to write software for Mac OS X in Objective-C and, especially, with Cocoa. The new edition shows how to use NSUndoManager, add AppleScript capability to an application, do graphics work with OpenGL, and use Cocoa under Linux using GNUstep. As well, all the basic controls and design patterns are covered.