Author Description
John D. Preston, Psy.D., ABPP, is a licensed psychologist and the author or coauthor of twenty books. He is a professor of psychology at Alliant International University and has also served on the faculty of the University of California, Davis, School of Medicine. He has lectured widely in the United States and abroad. He is the recipient of the Mental Health Association's President's Award for contributions to the mental health professions.
