Vandad Nahavandipoor has developed software using Cocoa, Cocoa Touch, Assembly, Delphi, and .NET for many years. As a staff member of a global leader in mobile money solutions in London, he has worked with some of the world's biggest brands--such as Visa and US Bank--to deliver mobile applications to their customers. Vandad brings an interest in management, leadership and entrepreneurship to his work, believing in the synergy that is achieved as a result of cooperation and working together in a team. Vandad is the author of iOS 4 Programming Cookbook, Concurrent Programming in Mac OS X and iOS, Writing Game Center Apps in iOS and Graphics and Animation on iOS.