Dave Mark is a longtime Mac developer and author who has written a number of books on Mac and iOS development, including Beginning iPhone 4 Development (Apress, 2010), More iPhone 3 Development (Apress, 2010), Learn C on the Mac (Apress, 2008), The Macintosh Programming Primer series (Addison-Wesley, 1992), and Ultimate Mac Programming (Wiley, 1995). Dave loves the water and spends as much time as possible on it, in it, or near it. He lives with his wife and three children in Virginia.
Jack Nutting has been using Cocoa since the olden days, long before it was even called Cocoa. He has used Cocoa and its predecessors to develop software for a wide range of industries and applications, including gaming, graphic design, online digital distribution, telecommunications, finance, publishing, and travel. When he is not working on Mac or iOS projects, he is developing web applications with Ruby on Rails. Nutting is a passionate proponent of Objective-C and the Cocoa frameworks. At the drop of a hat, he will speak at length on the virtues of dynamic dispatch and run time class manipulations to anyone who will listen (and even to some who won t). Nutting is the primary author of Learn Cocoa on the Mac (Apress, 2010) and Beginning iPad Development for iPhone Developers (Apress, 2010). He blogs from time to time at Nuthole.com.
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 for MacTech 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.
Fredrik Olsson has been using Cocoa since Mac OS X 10.1, and for iPhone since the unofficial toolchain. He has a long and varied career ranging from real-time assembly to enterprise Java with a passion for Objective-C for it's elegance, Cocoa frameworks for their clarity, and both for creating a greater whole than their parts. When away from a keyboard Fredrik has spoken at conferences and lead developer training.