Thanks to our reviewers: Mark Windholtz, Ralph Johnson, Uncle Bob Martin, John Brewer, Phil Goodwin, Jean-Marc Heneman, Erik Meade, Alan Francis, Josu Oyanguren, Jim Stearns, Joel Jones, Bill Caputo, Randy Coulman, Andrew Nielsen, Brian Button, Don Wells, Gary Clayburg, James Goebel, Paul Sinnett, Bill deHora, Andreas Stankewitz, Frank Westphal, Georg Tuparev, Stuart Donovan, Joi Ellis, Alistair Cockburn, Matt Simons, Rob Mee, and Joshua Kerievsky.

Kent would like to thank Cindee, Bethany, Lincoln, Lindsey, Forrest, and Joëlle for their gift of time. Also, watching my brilliant coauthor Martin learn to skip rocks was the purest joy I've had in a good long time.

Martin would like to thank the folks at ThoughtWorks for trying and pushing beyond many of these ideas and for giving him the time to write this. But especially to thank Cindy for more reasons than would fit in this book.

Together, we'd like to thank our editor, Mike Hendrickson, and the staff at AWL: Heather Peterson, Heather Olszyk, Mike Guzikowski, and Tyrrell Albaugh.

Thanks to Bob Coe and Ron Jeffries for trusting us, then going beyond.

Our deepest thanks go to Robert Cecil "Uncle Bob" Martin. You'll find many of his words and thoughts in these pages.