The anxiety management principles and program described in this book are based on the clinical treatment program, Cool Kids, developed at Macquarie University, Sydney, Australia. Cool Kids is an evolving program that is based on many years of scientific research, theory, and clinical feedback. These developments could not have come without the invaluable input from a countless number of researchers and practitioners. It is simply not possible to mention or thank all the many people who have influenced this program. However, special thanks for the most recent developments go to Maree Abbott, Jennie Hudson, Susan Kennedy, Carolyn Schniering, and Viviana Wuthrich. We would also like to acknowledge the pioneering work of Paula Barrett, Mark Dadds, and Phil Kendall.