(compiled using following website)
http://www.isfdb.org/cgi-bin/ea.cgi?Dean_R._Koontz
Novels 1968 to 1979
* Star Quest (1968)
* The Fall of the Dream Machine (1969)
* Fear that Man (1969)
* Beastchild (1970)
* Anti-Man (1970)
* Dark Symphony (1970)
* Dark of the Woods (1970)
* Hell's Gate (1970)
* The Crimson Witch (1971)
* Legacy of Terror (1971) [as by Deanne Dwyer ]
* A Darkness in My Soul (1972)
* Warlock! (1972)
* Time Thieves (1972)
* The Flesh in the Furnace (1972)
* Starblood (1972)
* Demon Child (1972) [as by Deanne Dwyer ]
* Children of the Storm (1972) [as by Deanne Dwyer ]
* The Dark of Summer (1972) [as by Deanne Dwyer ]
* Chase (1972) [as by K. R. Dwyer ]
* Demon Seed (1973)
* A Werewolf Among Us (1973)
* The Haunted Earth (1973)
* Hanging On (1973)
* Blood Risk (1973) [as by Brian Coffey ]
* Dance with the Devil (1973) [as by Deanne Dwyer ]
* Shattered (1973) [as by K. R. Dwyer ]
* After the Last Race (1974)
* Surrounded (1974) [as by Brian Coffey ]
* Nightmare Journey (1975)
* Wall of Masks (1975) [as by Brian Coffey ]
* Dragonfly (1975) [as by K. R. Dwyer ]
* The Long Sleep (1975) [as by John Hill ]
* Invasion (1975)
o Variant Title: Winter Moon (rev 1994) (1975)
o Variant Title: Invasion (1975) [as by Aaron Wolfe ]
* Night Chills (1976)
* Prison of Ice (1976)
o Variant Title: Icebound (rev 1995) (1976)
o Variant Title: Prison of Ice (1976) [as by David Axton ]
* The Vision (1977)
* The Face of Fear (1977) [as by Brian Coffey ]
* The Face of Fear (UK) (1978) [as by K. R. Dwyer ]
* The Key to Midnight (1979) [as by Leigh Nichols ]