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. Deborah Roth Ledley, PhD, is Assistant Professor of Psychology in Psychiatry at the University of Pennsylvania School of Medicine, as well as a faculty member at the Center for the Treatment and Study of Anxiety at the University of Pennsylvania. Her publications include scientific articles and book chapters on the nature and treatment of social phobia, obsessive/n-/compulsive disorder, and other anxiety disorders. She is coauthor of Making Cognitive-Behavioral Therapy Work. Richard G. Heimberg, PhD, is Professor of Psychology, Director of Clinical Training, and Director of the Adult Anxiety Clinic of Temple University. Past president of the Association for Advancement of Behavior Therapy, he is well known for his efforts to develop and evaluate cognitive-behavioral treatments for social anxiety, and has published widely on anxiety disorders and related topics. He is coeditor or coauthor of several books, including Social Phobia, Managing Social Anxiety, Generalized Anxiety Disorder, Cognitive-Behavioral Group Therapy for Social Phobia, and Making Cognitive-Behavioral Therapy Work.