DMT and the Soul of Prophecy: A New Science of Spiritual Revelation in the Hebrew Bible, Park Street Press, 2014
DMT, The Spirit Molecule: A Doctor’s Revolutionary Research Into the Biology of Near-Death and Mystical Experiences, Park Street Press, 2001
Do It Anyway: The Handbook for Finding Personal Meaning and Deep Happiness in a Crazy World / Inner Ocean, 2003
Do You See What I See? Memoirs of a Blind Biker: Lasers and Love, ESP and the CIA, and the Meaning of Life, Hampton Roads, 2008
Dolphin Talk: An Animal Communicator Shares Her Connection (cassette tape), Beyond Words Publishing, 1998