Filmography
| 2013 | Odd Thomas · as Novel |
| 2004 | Frankenstein · as Screenplay |
| 2002 | |
| 2001 | |
| 2000 | Sole Survivor · as Novel |
| 1998 | Mr. Murder · as Novel |
| 1998 | Watchers Reborn · as Novel |
| 1998 | Phantoms · as Screenplay |
| 1997 | Intensity · as Novel |
| 1997 | Intensity (TV Series) |
| 1995 | Hideaway · as Novel |
| 1994 | Watchers III · as Novel |
| 1991 | Servants of Twilight · as Novel |
| 1990 | Whispers · as Novel |
| 1990 | The Face of Fear · as Novel |
| 1990 | Watchers II · as Novel |
| 1988 | Watchers · as Novel |
| 1977 | Demon Seed · as Novel |
| 1977 | The Passengers · as Novel |