This book was conceived by Ann Sellers at Addison-Wesley, and I hope I’ve lived up to her confidence in offering me the opportunity to write it. Greg Doench brought the book through editing and production. Lara Wysong was tireless in seeing the book into presentable shape; Evelyn Pyle’s copy edits made me look much smarter.
I’d like to acknowledge the help given by David Gleason and Matthew Formica of Apple for responding to my questions. Matt nudged me into a couple of new directions, and although I couldn’t completely follow his lead, his guidance improved this book.
Here in Chicago, Bob Frank and Jon Rentzsch offered helpful suggestions. And Kate, Bess, and Selena all showed faith.