THE PRODUCTION of this book has been a community effort, with so much owed to so many that we cannot acknowledge everyone who helped by name. However, a very special thank-you goes to all of the contributing authors of this edition and their predecessors, with particular thanks to the editors of the previous two editions, Rebecca Buck and Jean Gilmore.
John is forever grateful to Julianne Snider for her support, advice, technical expertise, help with figures, and general wise counsel during the course of this project.
Toni would like to thank Scott Kiser for his understanding of such an important project and the help provided during many editing and writing sessions.
We thank our editor at Rowman & Littlefield, Charles Harmon, for the opportunity to take on this project and for his continual interest and support.