| title | ISBN-13 | year of publication |
|---|---|---|
| Body and Soul: An Integral Perspective | 978-1-4538-3786-3 | 2010 |
| History of Mysticism: The Unchanging Testament | 978-1-84293-051-9 | 2002 |
| Mysticism and Science: A Call for Reconciliation | 978-1-84694-032-3 | 2007 |
| Reflections On The Soul: Variations On A Theme By Plotinus | 978-1-4515-6222-4 | 2010 |
| The Divine Universe: An Alternative To The Scientific Worldview | 978-0-595-52751-9 | 2008 |
| The Supreme Self | 978-1-905047-45-1 | 2006 |
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