Jeff VanVonderen (born October 2, 1952) is an American author, speaker, and family therapist specializing in addiction, family systems, and spiritual health. He is best known for his books such as 'The Subtle Power of Spiritual Abuse' and 'Families Where Grace Is in Place,' which emphasize healthy relationship patterns and critique spiritual abuse and religious control. With extensive clinical experience, he has worked at treatment centers like Hazelden and lectured globally. His insights have influenced many individuals and groups seeking recovery from addiction and dysfunctional family dynamics.