| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Archetypes of the Enneagram: Exploring the Life Themes of the 27 Enneagram Subtypes from the Perspective of Soul | 978-0-9824792-1-6 (0-9824792-1-2) | 2010 |
| The Integral Enneagram: A dharma-oriented approach for linking the nine personality types, nine stages of transformation & Ken Wilber's Integral Operating System | 978-0-9824792-2-3 (0-9824792-2-0) | 2013 |
| The Positive Enneagram: A New Approach to the Nine Personality Types | 978-0-9824792-0-9 (0-9824792-0-4) | 2009 |