| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 1999 | 978-0-9673866-0-7 | Theodorre Donson · Kathy Hurley | Enneagram for the 21st Century |
| 2000 | 978-0-9673866-2-1 | Kathy Hurley · Theodorre Donson | Discover Your Soul Potential: Using the Enneagram to Awaken Spiritual Vitality |
| 2002 | 978-0-9673866-4-5 | Alyce Parsons · Kathy Hurley · Theodorre Donson | Essential Self, Essential Style: Align Your Inner Essence and Outer Expression |