Martin M. Antony, PhD, ABPP, is Professor in the Department of Psychology at Ryerson University in Toronto, Ontario, Canada, where he was founding Graduate Program Director for the MA and PhD programs in psychology. He is also Director of Research at the Anxiety Treatment and Research Centre at St. Joseph's Healthcare Hamilton. Dr. Antony has received career awards from the Society of Clinical Psychology (Division 12 of the American Psychological Association), the Canadian Psychological Association (CPA), and the Anxiety and Depression Association of America. He is a Fellow of the Royal Society of Canada and the American and Canadian Psychological Associations, and a past president of the CPA. He has published 200 scientific articles and book chapters and numerous books, including Handbook of Assessment and Treatment Planning for Psychological Disorders, Second Edition, and The Anti-Anxiety Workbook.David H. Barlow, PhD, ABPP, is Professor of Psychology and Psychiatry and Founder and Director Emeritus of the Center for Anxiety and Related Disorders at Boston University. Dr. Barlow has published over 500 articles and book chapters and over 60 books and clinical manuals--some translated in over 20 languages, including Arabic, Chinese, Hindi, and Russian--primarily in the areas of emotional disorders and clinical research methodology. He has been the recipient of numerous awards, including, most recently, the Career/Lifetime Achievement Award from the Association for Behavioral and Cognitive Therapies. He is past president of the Society of Clinical Psychology and the Association for Behavioral and Cognitive Therapies and past editor of the journals Clinical Psychology: Science and Practice and Behavior Therapy.