Sean K. Smith is an author, journalist, and screenwriter. A graduate of Harvard and Stanford Universities, he has authored numerous books and articles and written for film and television. He lives in Los Angeles with his two sons.

Dr. Debbie Joffe Ellis is a licensed psychologist in Australia and mental health counselor in New York. She is affiliated with several major psychological associations and societies including being a Member of the Australian Psychological Society, and an International Affiliate Member of the American Psychological Association. For several years, she worked with her husband, Dr. Albert Ellis, giving public presentations and professional trainings in Rational Emotive Behavior Therapy (REBT), as well as collaborating on writing and research projects, until his death in 2007. She now continues to present, practice and write about his groundbreaking psychotherapeutic approach of REBT. She has also co-authored several forthcoming books with Dr. Albert Ellis. She currently has a private practice in New York City, and also delivers lectures, workshops and seminars throughout the U.S.A. and across the globe.