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