Len Sperry, MD, PhD, is professor of mental health counseling at Florida Atlantic University and clinical professor of psychiatry and behavioral medicine at the Medical College of Wisconsin. He has practiced, researched, and taught psychotherapy for more than 40 years. He has more than 600 publications, including more than 60 books, mostly on psychotherapy. He has collaborated with Dr. Carlson on several articles, book chapters, books on psychotherapy, and other projects.
Jon Carlson, PsyD, EdD, is Distinguished Professor of Psychology and Counseling at Governors State University and a psychologist at the Wellness Clinic in Lake Geneva, Wisconsin. He has practiced and taught psychotherapy for more than 40 years. He has authored 160 journal articles and 60 books and created over 300 professional trade videos and DVDs with leading therapists and educators. He is the recipient of several awards for his contributions to psychotherapy.