| ▲Título▼ | ▲C▼ | ▲Año▼ | ▲V▽ | ▲Concepto▼ |
|---|---|---|---|---|
| The Secret of Knossos |   | 2004 | — | Escritor |
| Professionaly Speaking: The Cryptozoologist (junto a Steffen Schütte) |  | 2006 | — | Escritor |
| Deities of the Mythos ("Malleus Monstrorum") (junto a Marion Anderson, Phil Anderson, Scott David Aniolowski et al.) |  | 2006 | — | Escritor |
