Outside of Apple, there are very few people with a better understanding of Core Data than Marcus Zarra. He has not only written the book on Core Data, he has been doing iPhone, and now iPad, development as long as it has been possible to do so, and Mac programming for longer than that. With Matt Long, Marcus is the co-author of the absolutely incredible programming blog Cocoa Is My Girlfriend. Marcus and Matt also wrote Core Animation: Simplified Animation Techniques for Mac and iPhone Development for Addison Wesley. Marcus is the owner of Zarra Studious where he builds Mac, iPhone, and iPad software for a wide variety of clients and customers.

Writer for Cocoa Is My Girlfriend.