| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Discover Your Soul Potential: Using the Enneagram to Awaken Spiritual Vitality | 978-0-9673866-2-1 (0-9673866-2-4) | 2000 | Theodorre Donson |
| Enneagram for the 21st Century | 978-0-9673866-0-7 (0-9673866-0-8) | 1999 | " |
| Essential Self, Essential Style: Align Your Inner Essence and Outer Expression | 978-0-9673866-4-5 (0-9673866-4-0) | 2002 | Alyce Parsons · Theodorre Donson |
K. H. · Kate Harrell · Kate Hurley · Katie Hurley · Keith Harrell