Jeff LaMarche is a Mac and iOS developer with more than 20 years of programming experience. Jeff has written a number of iOS and Mac development books, including Beginning iPhone 3 Development (Apress, 2009), More iPhone 3 Development (Apress, 2010), and Learn Cocoa on the Mac (Apress, 2010). Jeff is a principal at MartianCraft, an iOS and Android development house. He has written about Cocoa and Objective-C forMacTech Magazine, as well as articles for Apple s developer web site. Jeff also writes about iOS development for his widely-read blog at http: //iphonedevelopment.blogspot.com