Group Cognitive-Behavioral Therapy of Anxiety: A Transdiagnostic Treatment Manual. Peter J. Norton. New York: The Guildford Press, 2012. ISBN-10: 1462504809/ISBN-13: 978-1462504800 … Original article: Group Cognitive-Behavioral Therapy of Anxiety: A Transdiagnostic Treatment Manual. Peter J. Norton. New York: The Guildford Press, 2012. ISBN-10: 1462504809/ISBN-13: 978-1462504800