Matthew McKay, PhD, is a professor at the Wright Institute in Berkeley, CA. He has authored and coauthored numerous books, including 
The Relaxation and Stress Reduction Workbook, Self-Esteem, Thoughts and Feelings, When Anger Hurts, and 
ACT on Life Not on Anger. McKay received his PhD in clinical psychology from the California School of Professional Psychology, and specializes in the cognitive behavioral treatment of anxiety and depression. He lives and works in the Bay Area. 
Patrick Fanning is a professional writer in the mental health field. He is author of 
Visualization for Change and 
Lifetime Weight Control and coauthor of several self-help books, including 
Self-Esteem and 
50 Ways to Simplify Your Life.
Avigail Lev, PsyD, maintains a private practice in Berkeley, CA. She specializes in couples' therapy and also treats individuals who struggle with interpersonal problems, anxiety, trauma, chronic pain, and mood disorders. She has provided supervision, trainings, and workshops utilizing cognitive behavioral therapy (CBT) and is the coauthor of 
Acceptance and Commitment Therapy for Interpersonal Problems. 
Michelle Skeen, PsyD, is a therapist who lives and works in San Francisco, CA. She has provided brief and long-term therapy for individuals and couples utilizing schema, cognitive, and behavioral therapies to address interpersonal issues, weight management, anger, depression, anxiety, disabilities, and trauma. She is the author of 
The Critical Partner and coauthor of 
Acceptance and Commitment Therapy for Interpersonal Problems, and is currently working on her fourth book for New Harbinger Publications, 
Love Me Don't Leave Me, a self-help book that provides breakthrough, evidence-based solutions for women (and men) struggling with the fear of abandonment. Michelle hosts a weekly radio show called 
Relationships 2.0 with Dr. Michelle Skeen on KCAA-1050AM. To find out more about Michelle, visit her website at 
www.michelleskeen.com.