Christian Keur is a software engineer and instructor at Big Nerd Ranch, where he maintains the course materials for the company's highly acclaimed iOS training, on which this book is based. Christian earned a degree in Computer Science from Georgia Tech and can often be found wandering around Atlanta, glancing up at the stars, or reading a book. Aaron Hillegass, founder of Big Nerd Ranch and a former employee at NeXT and Apple, has nearly two decades' experience programming and teaching Objective-C, Cocoa, and, more recently, iOS.
Aaron is the co-author of Cocoa Programming for Mac OS X and Objective-C Programming : The Big Nerd Ranch Guide.