Ronald M. Rapee, PhD, is currently professor in the Department of Psychology at Macquarie University in Sydney, Australia, and director of the Centre for Emotional Health. He has been involved in an advisory capacity with the DSM-IV and DSM-V, and he is a member of the US-government-sponsored Project Liberty, which works to develop anxiety management programs for children affected by disasters. He is on the scientific advisory committee for the Swiss Etiological Study of Adjustment and Mental Health, and the editorial board of several international journals.Ann Wignall, M. Psych, is senior clinical psychologist and director of child and adolescent mental health for Northern Sydney Health Service. She founded the Child and Adolescent Anxiety Clinic, Royal North Shore Hospital, and works clinically with children and families with a broad range of anxiety and behavioral disorders.Susan H. Spence, PhD, is professor of psychology and dean of the Division of Linguistics and Psychology at Macquarie University in Sydney, Australia. She was previously head of the School of Psychology at the University of Queensland, where she was also the head the School of Journalism and Communication for a time. She is a researcher and clinical psychologist who specializes in the assessment, prevention, and treatment of child and adolescent anxiety and depression. To date she has published more than 100 books and academic articles in her field.Vanessa Cobham, PhD, holds appointments within the School of Psychology at the University of Queensland and within the Mater Child and Youth Mental Health Service in Brisbane.Heidi Lyneham, PhD, is currently a research fellow within the Department of Psychology at Macquarie University and deputy director of the Centre for Emotional Health.