The Diaries of the Family Dracul •
Covenant with the Vampire (1995) •
Children of the Vampire (1996) •
Lord of the Vampires (1997)
Novels •
Specters (1991) (as J.M. Dillard) •
The Burning Times (1997) •
The Borgia Bride (2005) •
I, Mona Lisa (2006) (UK title:
Painting Mona Lisa) • ''The Devil's Queen'' (2009) •
The Scarlet Contessa: A Novel of the Italian Renaissance (2010) • ''The Inquisitor's Wife'' (2013) •
The Orphan of Florence (2017)
Movie Novelizations •
The Fugitive (1993) •
Bulletproof Monk (2003)
Star Trek: The Original Series •
Mindshadow (1985) •
Demons (1986) •
Bloodthirst (1987) •
The Lost Years (1989) •
Recovery (1995)
Star Trek Movie Novelizations •
Star Trek V: The Final Frontier (1989) •
Star Trek VI: The Undiscovered Country (1991) •
Star Trek Generations (1994) •
Star Trek: First Contact (1996) •
Star Trek: Insurrection (1998) •
Star Trek: Nemesis (2002)
Star Trek: The Next Generation •
Possession (1996) (with Kathleen O'Malley) •
Resistance (2007)
Star Trek: Deep Space Nine •
Emissary (1993)
Star Trek: Enterprise • ''
Surak's Soul'' (2003) •
The Expanse (2003)
War of the Worlds •
The Resurrection (1988)
Other books •
Star Trek: Where No One Has Gone Before - A History in Pictures (1994) •
Star Trek: The Next Generation Sketchbook - The Movie: Generations & First Contact (1998) (with John Eaves) ==References==