Every textbook is a collaboration of a large number of dedicated and talented people.
In writing this book, I have been guided, helped, and supported by a multitude of generous and wise people. My beloved Linda, who has borne most of the burdens of our daily life these past six months, and who still found time to contribute her wisdom and insight to this book. My parents, James and Sandra, for their faith, love, and very practical support over so many years. They have been the giants on whose shoulders I stood. Tom Christiansen, for his extraordinary generosity in reviewing the entire manuscript at short notice and in record time.