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