- Light from the Other Side: The Paranormal as Friend and Familiar (Real Life Experiences of a Spiritual Pilgrim)
- Science, Religion, and Health
- The Spirituality of Sex
- Radical Grace: How Belief in a Benevolent God Benefits Our Health (Psychology, Religion, and Spirituality)
- Understanding Religious Experiences: What the Bible Says about Spirituality (Psychology, Religion, and Spirituality)