2016
Existence and the Intelligence of the Cosmos
2014
Reflections on the Mystery of Death and Rebirth in LSD Psychotherapy

2006
Reincarnation and the Akashic Field

2004
Sacred Medicine - Conintuing the Dialogue

2003
Is the Sacred Medicine Path a Legitimate Spiritual Path?
2000
The Epistemic Warrant of Psychedelic Experience

2001
On the Emergence of Perinatal Symptoms in Buddhist Meditation
1996
Expanding Grof's Concept of the Perinatal

1994
A Perinatal Interpretation of Near-Death Experiences

1991
Mysticism and Psychedelics - The Case of the Dark Night

1985
A Reappraisal Of Teresa Of Avila's Supposed Hysteria