| ▲Título▼ | ▲C▽ | ▲Año▼ | ▲V▼ | ▲Concepto▼ |
|---|---|---|---|---|
| In Rerum Supernatura |   | 1992 | — | Escritor |
Further Notes on the Necronomicon |  | 1983 | — | Escritor |
| The Kabbalistic Science of Gematria |   | 1984 | — | Escritor |
| Sourcebook for the 1920s (junto a Larry DiTillio y Keith Herber) |  | 1989 | — | Escritor |
| Deities of the Mythos ("Malleus Monstrorum") (junto a Phil Anderson, Marion Anderson, Scott David Aniolowski et al.) | | 2006 | — | Escritor |
Thoth's Dagger |  | 1983 | 6.67 | Escritor |
The City Without a Name | | 1984 | 6.00 | Escritor |
| On The Ubiquity of Cthulhu |  | 1985 | — | Escritor |
| Notes on a Fragment of the Necronomicon | | 1981 | — | Escritor |
