The product is a textbook titled "Systems of Psychotherapy: A Transtheoretical Analysis" by authors John C. Norcross, James O. Prochaska, and Judith J. Prochaska. Published by Oxford University Press, Incorporated, it covers the subject areas of psychology, medical education, and psychotherapy. This revised edition features 600 pages and is written in English, making it suitable for adult education and advanced training levels in the field of psychotherapy. The book delves into various systems of psychotherapy and provides a comprehensive analysis of different approaches within the field.