| ▲Título▼ | △C▼ | ▲Año▼ | ▲V▼ | ▲Concepto▼ |
|---|---|---|---|---|
| The Temple of Nephren-Ka (junto a Philip J. Rahman) |   | 1977 | — | Escritor |
| New Phobias |   | 1983 | — | Escritor |
| The Mystery of Loch Feinn |  | 1983 | 8.00 | Escritor |
| Creatures of the Mythos ("Malleus Monstrorum") (junto a Marion Anderson, Scott David Aniolowski, Bruce Ballon et al.) |  | 2006 | — | Escritor |
| Deities of the Mythos ("Malleus Monstrorum") (junto a Phil Anderson, Marion Anderson, Scott David Aniolowski et al.) | | 2006 | — | Escritor |
| Alone Against the Wendigo | | 1985 | — | Escritor |
