D. Richard Laws, PhD, until his death in 2020, was Director of Pacific Behavioural Assessment in Victoria, British Columbia, Canada. He was a past president of the Association for the Treatment of Sexual Abusers. He held adjunct faculty positions at Cardiff University in the United Kingdom and at the University of Victoria and Simon Fraser University in British Columbia, and was Honourary Professor at the University of Birmingham, United Kingdom. Dr. Laws was known in the field of sexual deviation as a developer of assessment procedures and behavior therapies.

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William T. O’Donohue, PhD, a licensed clinical psychologist in Nevada, has been a full Professor of Clinical Psychology at the University of Nevada, Reno, since 1999. Dr. O’Donohue is a member of the Association for Behavioral and Cognitive Therapies and has served on the board of directors of this organization. Since 1996, he has received over $1.5 million in federal grant monies from sources including the National Institute of Mental Health and the National Institute of Justice. He has edited over 30 books, coauthored three books, and published more than 100 articles in scholarly journals.