Koontz used several pseudonyms when establishing his career. Three of the main names he used were Leigh Nichols, Brian Coffey, K.R. Dwyer, and Owen West. Editors and agents insisted that he use a different pen name each time he published a differing type of work from the last, telling him that "readers always wanted pretty much the same book from an author every time, and because I refused to write to formula, they wanted me at least to group books of similar narrative style under the same pen name." Of course the work stood on it's merrits, and Knootz's career blosomed to what it is today. He no longer uses pen names.

After the Last Race
New York: Atheneum, 1974.

Anti-Man
New York: Paperback Library, 1970.

The Bad Place
New York: Putnam, 1990.

Beastchild
New York: Lancer, 1970.

Blood Risk
[as "Brian Coffey"]
New York: Bobbs-Merrill, 1973.

Chase
[as "K. R. Dwyer]
New York: Random House, 1972.

Children of the Storm
[as "Deanna Dwyer"]
New York: Lancer, 1972

Cold Fire
New York: Putnam, 1991

The Crimson Witch
New York: Curtis Books, 1971

Dance With The Devil
[as "Deanna Dwyer"]
New York: Lancer, 1972

Dark Rivers of the Heart
New York: Alfred A. Knoph, 1994

The Dark of the Woods
New York: Ace, 1970

The Dark Symphony
New York: Lancer, 1970

Darkfall
New York: Berkley, 1984

Darkness in My Soul
New York: DAW Books, 1972

Demon Child
[as "Deanna Dwyer"]
New York: Lancer, 1971

Demon Seed
New York: Bantam, 1973

The Door to December
[as "Richard Paige"]
New York: New American Linrary, 1985

Dragon Tears
New York: Putnam, 1993

Dragonfly
[as "K.R. Dwyer"]
New York: Random House, 1975

The Eyes of Darkness
[as "Leigh Nichols"]
New York: Pocket Books, 1981

The Face of Fear
[as "Brian Coffee"]
New York: Bobbs-Merrill, 1977

The Fall of the Dream Machine
New York: Ace Books, 1969

Fear Nothing
Bantam Doubleday Dell, 1998
(Latest Release at time of writing)

Fear That Man
New York: Ace Books, 1969

The Flesh in the Furnace
New York: Bantam, 1972

The Funhouse
[as "Owen West"]
New York:Jove Books, 1980

Hanging On
New York: M. Evans, 1973

Hell's gate
New York: Lancer Books, 1970

Hideaway
New York: Putnam, 1992

The House of Thunder
[as "Leigh Nichols"]
New York: Pocket Books, 1982

Intensity
New York: Ballantine, 1996

Invasion
[as "Aron Wolfe"]
Ontario: Laser Books, 1975

The Key To Midnight
[as "Leigh Nichols"]
New York: Pocket Books, 1979

Legacy of Terror
[as "Deanna Dwyer"]
New York: Lancer, 1977

Lightning
New York: Putnam, 1988

The Long Sleep
[as "John Hill"]
New York: Popular Library, 1975

The Mask
[as "Owen West"]
New York: Jove Books, 1981

Midnight
New York: Putnam

Mr. Murder
New York: Putnam, 1993

Night Chills
New York:Atheneum, 1976

Oddkins
New York: Warner Books, 1988

Phantoms
New York: Putnam, 1983

Prison of Ice
[as "David Axton"]
New York: Lippincott, 1976

The Servants of Twilight
New York: Pocket Books, 1984

Shadowfires
[as "Leigh Nichols"]

Shattered
[as "K.R. Dwyer"]
New York: Random House, 1973

Soft Come the Dragons
New York: Ace Books, 1970

Sole Survivor
New York: Random House
1997

Star Quest
New York: Ace Books, 1970

Strangers
New York: Putnam, 1986

Strike Deep
[as "Anthony North"]
New York: Dial Press, 1974

Surrounded
[as "Brian Coffee"]
New York:Bobbs-Merrill, 1974

Time Thieves
New York: Ace Books, 1972

Twilight
[as "Leigh Nichols"]
New York: Pocket Books, 1984

Twilight Eyes
Plymouth: The Land of Enchantment
(expanded version: New York: Berkley Books, 1987)

The Vision
New York: Putnam, 1977

The Voice of the Night
[as "Brian Coffee"]
New York: Doubleday, 1988

The Wall of Masks
[as "Brian Coffee"]
New York: Bobbs-Merrill, 1975

Warlock
New York: Lancer, 1972

Watchers
New York: Putnam, 1987

A Warewolf Among Us
New York: Ballantine, 1973

Whispers
New York: Putnam, 1980

Winter Moon
New York: Ballantine, 1994

"Dean R. Koontz" was the name that appeared on all his earlier books but on
all later books it is simply "Dean Koontz." The reason for this was simply to accomodate
the artwork for the books. Koontz was told that the "R" always looked out of place.