| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Discovering Eris: The Symbolism and Significance of a New Planetary Archetype | 978-0-86315-867-4 (0-86315-867-6) | 2012 |
| The Archetypal Cosmos: Rediscovering the Gods in Myth, Science and Astrology | 978-0-86315-775-2 (0-86315-775-0) | 2010 |