| ▲Título▼ | ▲C▼ | ▲Año▽ | ▲V▼ | ▲Concepto▼ |
|---|---|---|---|---|
| Creatures of the Mythos ("Malleus Monstrorum") (junto a Marion Anderson, Scott David Aniolowski, Bruce Ballon et al.) |   | 2006 | — | Escritor |
| A Timeline of the Golden Dawn | | 1996 | — | Escritor |
| Sheela-na-gig (junto a Alan Smithee y John Tynes) |  | 1996 | — | Escritor |
| The Outer Order Curriculum (junto a Alan Smithee) | | 1996 | — | Escritor |
| The Once and Future King (junto a Alan Smithee y John Tynes) | | 1996 | — | Escritor |
| A Keeper's History of the Golden Dawn | | 1996 | — | Escritor |
| The Inner Order Curriculum (junto a Alan Smithee) | | 1996 | — | Escritor |
| Important Members (junto a Alan Smithee) | | 1996 | — | Escritor |
| The Astral Plane (junto a Alan Smithee y John Tynes) | | 1996 | — | Escritor |
| Appendix E: The Inner Order Curriculum (Keepers' Version) (junto a Alan Smithee) | | 1996 | — | Escritor |
| Appendix D: The Outer Order Curriculum (Players' Version) (junto a Alan Smithee) | | 1996 | — | Escritor |
| Appendix B: A Player's History of the Golden Dawn | | 1996 | — | Escritor |
| Call of Cthulhu 5½: Sanity (junto a Kim Eastland, J. Todd Kingrea y Richard Watts) |  | 1992 | — | Escritor |
