Martin M. Antony, PhD, is professor and chair in the department of psychology at Ryerson University in Toronto, Canada. He is also director of research at the Anxiety Treatment and Research Centre at St. Joseph's Healthcare, Hamilton, Ontario, and a past president of the Canadian Psychological Association. An award-winning researcher, Antony is coauthor of When Perfect Isn't Good Enough, and more than 25 other books. His research, writing, and clinical practice focus is on cognitive behavioral therapy and the treatment of anxiety disorders. He has been widely quoted in the American and Canadian media.Richard P. Swinson, MD, is professor emeritus and past chair of the Department of Psychiatry and Behavioural Neurosciences at McMaster University in Hamilton, ON, Canada. He is also medical director of the Anxiety Treatment and Research Centre and past psychiatrist-in-chief at Joseph's Healthcare, also in Hamilton. He is a fellow of the Royal College of Physicians and Surgeons of Canada, the American Psychiatric Association, and the Royal College of Psychiatrists UK. He was awarded an inaugural fellowship of the Canadian Psychiatric Association in 2006. His research interests lie in the theory, assessment and treatment of anxiety disorders, particularly obsessive-compulsive disorder and social anxiety disorder. He has published more than 180 peer-reviewed papers, thirty book chapters, and eight books. Dr. Swinson has held numerous research grants since 1966 and has been an invited speaker at many conferences around the world on anxiety disorders and substance use disorders. He also chaired the steering committee for the Canadian Anxiety Treatment Guidelines Initiative, leading to the publication of Canadian Clinical Practice Guidelines for the Management of Anxiety Disorders in 2006.