Aparece a menudo como Shannon Appel. Ahora trabaja en Skotos Tech.
| ▲Título▼ | ▲C▼ | ▲Año▼ | ▲V▽ | ▲Concepto▼ |
|---|
| VII: The Halls of Celaeno (junto a Kevin Ross) |   | 1998 | — | Escritor |
| Turnabout (junto a Eric Rowe) | | 1995 | — | Escritor |
| To Wake, Perchance to Dream (junto a Earl Geier y Eric Rowe) | | 1995 | — | Escritor |
| Sanity and Insanity (junto a Bruce Ballon, Paul Carrick, Eric Rowe y Michael Tice) |  | 1998 | — | Escritor |
| The Mythos Prehistory of the Earth (junto a Lynn Willis) |   | 1992 | — | Escritor |
| Introduction (to "Day of the Beast") |  | 1998 | — | Escritor |
| I: Suffer Little Children (junto a Gary O'Connell, Lucya Szachnowski y M. Wayne Miller) | | 1998 | — | Ilustrador |
| Gazetteer of the Moon (junto a Drashi Khendup, Sandy Petersen, Kevin Ross y Chris Williams) |  | 1997 | — | Escritor |
| Deities of the Mythos (junto a Marion Anderson, Phil Anderson, Scott David Aniolowski, Paul Carrick, Larry DiTillio, Clifton Ganyard, Earl Geier, Geoff Gillan, Steve Hatherley, Keith Herber, Kevin W. Jacklin, Randy McCall, Sandy Petersen, Kevin Ross, Rodell Sanford Jr., Michael Szymanski, G.W. Thomas y Lynn Willis) | | 1998 | — | Escritor |
| Deities of the Mythos (junto a Tony Ackland, Lori Deitrick, Earl Geier, Sandy Petersen y Lynn Willis) | | 1998 | — | Escritor |
| The Curse of Anubis (junto a Eric Rowe) | | 1995 | — | Escritor |
| Creatures of the Mythos (junto a Tony Ackland y Lori Deitrick) | | 1998 | — | Escritor |
| Creatures of the Mythos (junto a Scott David Aniolowski, Bill Barton, Fred Behrendt, John Carnahan, Paul Carrick, Larry DiTillio, Clifton Ganyard, Earl Geier, Sheldon Gillet, Ed Gore, Steve Hatherley, Keith Herber, J. Todd Kingrea, Doug Lyons, Randy McCall, Kurt Miller, Sandy Petersen, Kevin Ross, Rodell Sanford Jr. y Lynn Willis) | | 1998 | — | Escritor |
| Creating a Dreamlands Adventurer | | 1997 | — | Escritor |
| Campaign Kit (junto a Les Brooks, Earl Geier y Charlie Krank) |   | 1996 | — | Escritor |
| Bethlem, Arkham, Bellevue (junto a Dave Carson, Earl Geier y Eric Rowe) | | 1995 | — | Escritor |
| Asylums (junto a Dave Carson, Earl Geier y Eric Rowe) | | 1995 | — | Escritor |
| Arkham Map in 1922 |   | 1981 | — | Escritor |
| Alien Technology (junto a Drashi Khendup) | | 1998 | — | Escritor |
