| ▲Título▼ | ▲C▽ | ▲Año▼ | ▲V▼ | ▲Concepto▼ |
|---|---|---|---|---|
Chapter 4B: SS Gabrielle (junto a Janice Engan y Charles Engan) |   | 1999 | — | Escritor |
| Handouts (to "Beyond the Mountains of Madness") (junto a Janice Engan, Charles Engan, John Goodrich y John T. Snyder) | | 1999 | — | Ilustrador |
| Appendices (to "Beyond the Mountains of Madness") (junto a Phil Anderson, Marion Anderson, Janice Engan et al.) | | 1999 | — | Ilustrador |
Antarctica Map (Starkweather-Moore Expedition) |  | 1999 | — | Ilustrador |
Chapter 10: The City of the Elder Things (junto a Janice Engan, Charles Engan y Mike Lay) |  | 1999 | — | Escritor |
