My thanks go to the many people who turned my manuscript into the highly graphical book you are holding. In particular, I thank Jody Lefevere for asking me to write the book; Sarah Hellert for keeping me on track and guiding the editorial process; Scott Tullis for skillfully editing the text; Dennis Cohen for reviewing the book for technical accuracy and contributing helpful sugggestions; and Ana Carrillo, Ronda David-Burroughs, Cheryl Grubbs, and Jill Proll for creating the pictures.