Acknowledgments I have always thought that whoever said that no man is an island got it pretty much backward. Most islands are the very tops of underwater mountains, the tiny green part that you see supported by a massive and invisible structure just below the waves. So, if the point is that no one does anything unaided, and that credit for everything we do should be spread among our friends and families and colleagues, then we are all islands, propped up by folks who help but who are not seen. Certainly this book would have never gotten started or completed without the help of a mountain of very generous people. I would like to particularly thank my good friend Bob Kiel, who probably told me no less than 17,827 times that I should write a book. Thanks also to Xandy Johnson, for his generous support and encouragement throughout the writing of this book. I would also like to say "thank you" to everyone who reviewed this book in its various drafts, including the aforementioned Bob and Xandy, along with Mike Abner, Geoff Adams, Peter Cooper, Tom Corbin, Bill Higgins, Jason Long, Steve Metsker, Glenn Pruitt, Rob Sanheim, Mike Stok, and Gary Winklosky. And special thanks to Andy Lynn and Arild Shirazi, who both went over early drafts of the man- uscript with an invaluable, if sometimes painful, fine-toothed comb. Special thanks to Rob Cross for finding that "last" typo. Thanks also to Heli Roosild, a very professional writer who took the time to look over some things I had written and said, "Yes, this will do." Thanks also to Lara Wysong, Raina Chrobak, and Christopher Guzikowski, all of Addison-Wesley--especially Chris, who read a 900-word blog article and saw a 384-page xxv