John C. Norcross

John C. Norcross is an American professor, clinical psychologist, and author in self-help, psychotherapy and behavior change. He is Distinguished Professor and former chair of psychology at the University of Scranton and Clinical Professor of Psychiatry at SUNY Upstate Medical University. He also maintained a part-time practice of clinical psychology in Scranton, Pennsylvania for 36 years.
Norcross has authored or edited more than 400 publications and over 20 books, including the self-help works Changeology and Changing for Good.