Mark E. King, Ph.D., is a tenured Associate Professor in the Department of Child Development/Child Care, School of Social Work, at the University of Pittsburgh. He is a licensed psychologist with a private practice specializing in existential hypnosis and psychotherapy. He authored For We Are and edited Existential-Phenomenological Alternatives for Psychology.

Charles M. Citrenbaum, Ph.D., is a licensed psychologist in Baltimore, Maryland, with a private practice specializing in existential hypnosis and psychotherapy. He is past president of the Baltimore Psychological Association and a charter member of the Maryland Society for Clinical Hypnosis.

Together, Drs. King and Citrenbaum they have taught over 300 professional workshops in communication and hypnosis since 1980. Coauthors of Irresistible Communication: Creative Skills for the Health Professional, Modern Clinical Hypnosis for Habit Control, and The Courage to Recover, both are popular with the media and have appeared on numerous local and national television shows.