All Books
| Title | Year | Original | Current | Pen Name |
| The Night Window | 2019 | |||
| The Forbidden Door | 2018 | |||
| The Crooked Staircase | 2018 | |||
| The Whispering Room | 2017 | Bantam | Bantam | |
| The Silent Corner | 2017 | Bantam | Bantam | |
| Ashley Bell | 2015 | Bantam | Bantam | |
| “Final Hour (Novella)” | 2015 | Bantam | Bantam | |
| “Last Light (Novella)” | 2015 | Bantam | Bantam | |
| The City | 2014 | Bantam | Bantam | |
| Saint Odd | 2014 | Bantam | Bantam | |
| “The Neighbor (Novella)” | 2014 | Bantam | Bantam | |
| Ask Anna: Advice for the Furry and Forlorn | 2014 | Central Street | Central Street | |
| “You Are Destined to Be Together Forever (Novella)” | 2014 | Bantam | Bantam | |
| Innocence | 2013 | Bantam | Bantam | |
| Wilderness | 2013 | Bantam | Bantam | |
| Deeply Odd | 2013 | Bantam | Bantam | |
| Odd Interlude | 2012 | Bantam | Bantam | |
| Odd Apocalypse | 2012 | Bantam | Bantam | |
| Trixie and Jinx (iPad App) with artwork by Janet Cleland | 2012 | Auryn | Auryn | |
| Dean Koontz’s Odd Thomas 4-Book Bundle | 2012 | Bantam | Bantam | |
| The Frankenstein Series 5-Book Bundle | 2012 | Bantam | Bantam | |
| Oddkins | 2012 | Mel Parker Books and Open Road Media | Mel Parker Books and Open Road Media | |
| House of Odd (Graphic Novel) | 2012 | |||
| Nevermore | 2011 | Dynamite Comics | Dynamite Comics | |
| Dean Koontz’s Nevermore (comic book) | 2011 | Dynamite Comics | Dynamite Comics | |
| 77 Shadow Street | 2011 | Bantam | Bantam | |
| “The Moonlit Mind (Novella)” | 2011 | Bantam | Bantam | |
| I, Trixie who is dog (iPad App) with artwork by Janet Cleland | 2011 | Auryn | Auryn | |
| Frankenstein: The Dead Town | 2011 | Bantam | Bantam | |
| What the Night Knows | 2010 | Bantam | Bantam | |
| “Darkness Under the Sun (Novella)” | 2010 | Bantam | Bantam | |
| Trixie & Jinx | 2010 | Penguin | Penguin | |
| Fear Nothing, Volume 1 (Graphic Novel) | 2010 | Dynamite Comics | Dynamite Comics | |
| Odd is On Our Side (Graphic Novel) | 2010 | Del Rey | Del Rey | |
| Frankenstein: Lost Souls | 2010 | Bantam | Bantam | |
| A Big Little Life | 2009 | Hyperion | Hyperion | |
| Breathless | 2009 | Bantam | Bantam | |
| Frankenstein: Prodigal Son (Graphic Novel) | 2009 | Del Rey | Del Rey | |
| Frankenstein Book 3: Dead and Alive | 2009 | Bantam | Bantam | |
| Relentless | 2009 | Bantam | Bantam | |
| I Trixie, Who Is Dog | 2009 | Putnam | Putnam | |
| Your Heart Belongs to Me | 2008 | Bantam | Bantam | |
| Bliss to You | 2008 | Hyperion | Hyperion | |
| In Odd We Trust | 2008 | Del Rey | Del Rey | |
| Odd Hours | 2008 | Bantam | Bantam | |
| The Darkest Evening of the Year | 2007 | Bantam | Bantam | |
| The Good Guy | 2007 | Bantam | Bantam | |
| Brother Odd | 2006 | Bantam | Bantam | |
| The Husband | 2006 | Bantam | Bantam | |
| Forever Odd | 2005 | Bantam | Bantam | |
| Frankenstein Book 1: Prodigal Son | 2005 | Bantam | Bantam | |
| Frankenstein Book 2: City of Night | 2005 | Bantam | Bantam | |
| Velocity | 2005 | Bantam | Bantam | |
| Christmas is Good | 2005 | Yorkville | Yorkville | |
| Life Expectancy | 2004 | Bantam | Bantam | |
| Robot Santa | 2004 | HarperCollins | HarperCollins | |
| The Taking | 2004 | Bantam | Bantam | |
| Life is Good (with Trixie Koontz) | 2004 | Yorkville | Yorkville | |
| Odd Thomas | 2003 | Bantam | Bantam | |
| The Face | 2003 | Bantam | Bantam | |
| By the Light of the Moon | 2002 | Bantam | Bantam | |
| One Door Away From Heaven | 2001 | Bantam | Bantam | |
| The Paper Doorway | 2001 | HarperCollins | HarperCollins | |
| From the Corner of His Eye | 2000 | Bantam | Bantam | |
| Seize the Night | 1999 | Bantam | Bantam | |
| False Memory | 1999 | Bantam | Bantam | |
| Fear Nothing | 1998 | Bantam | Bantam | |
| Sole Survivor | 1997 | Knopf | Bantam | |
| Demon Seed (Revised Version) | 1997 | Berkley | Berkley | |
| Santa’s Twin | 1996 | HarperCollins | HarperCollins | |
| The Eyes of Darkness | 1996 | Pocket Books | Berkley | Leigh Nichols* |
| Tick Tock | 1996 | Ballantine | Bantam | |
| Intensity | 1995 | Knopf | Bantam | |
| Strange Highways | 1995 | Warner | Warner | |
| Chase (Revised Version) | 1995 | Headline | NA | K.R. Dwyer |
| Icebound | 1995 | Ballantine | Bantam | David Axton* |
| Winter Moon | 1994 | Ballantine | Bantam | |
| Mr. Murder | 1993 | Putnam/Berkley | Berkley | |
| Dragon Tears | 1993 | Putnam/Berkley | Berkley | |
| Hideaway | 1992 | Putnam/Berkley | Berkley | |
| Cold Fire | 1991 | Putnam/Berkley | Berkley | |
| Shadowfires | 1990 | Avon | Berkley | Leigh Nichols* |
| The Servants of Twilight | 1990 | Berkley | Berkley | Leigh Nichols* |
| The Bad Place | 1990 | Putnam/Berkley | Berkley | |
| Midnight | 1989 | Putnam/Berkley | Berkley | |
| Oddkins | 1988 | Warner | OP | |
| Lightning | 1988 | Putnam/Berkley | Berkley | |
| Watchers | 1987 | Putnam/Berkley | Berkley | |
| Twilight Eyes (Expanded Version) | 1987 | Berkley | Berkley | |
| Strangers | 1986 | Putnam/Berkley | Berkley | |
| The Door to December | 1985 | NAL/Signet | Nal/Signet | Richard Paige* |
| Twilight Eyes (Original Version) | 1985 | Land of Enchantment | OP | |
| Twilight (Later: The Servants of Twilight) | 1984 | Pocket Books | Berkley | Leigh Nichols* |
| Darkfall | 1984 | Berkley | Berkley | |
| Phantoms | 1983 | Putnam/Berkley | Berkley | |
| The House of Thunder | 1982 | Pocket Books | Berkley | Leigh Nichols* |
| The Mask | 1981 | Jove | Berkley | Owen West* |
| Whispers | 1980 | Putnam/Berkley | Berkley | |
| The Funhouse | 1980 | Jove | Berkley | Owen West* |
| The Voice of the Night | 1980 | Doubleday | Berkley | Brian Coffey* |
| The Key to Midnight | 1979 | Pocket Books | Berkley | Leigh Nichols* |
| The Vision | 1977 | Putnam | Berkley | |
| Face of Fear | 1977 | Bobbs-Merrill | Berkley | Brian Coffey* |
| Night Chills | 1976 | Antheneum | Berkley | |
| Prison of Ice (later Icebound) | 1976 | J.B. Lippincott | Bantam | David Axton* |
| Invasion (inspiration for Winter Moon 1994) | 1975 | Laser | OP | Aaron Wolfe |
| Dragonfly | 1975 | Random House | OP | K.R. Dwyer |
| The Long Sleep | 1975 | Popular Library | OP | John Hill |
| Nightmare Journey | 1975 | Berkley | OP | |
| The Wall of Masks | 1975 | Bobbs-Merrill | OP | Brian Coffey |
| After the Last Race | 1974 | Antheneum | OP | |
| Strike Deep | 1974 | Dial Press | OP | Anthony North |
| Surrounded | 1974 | Bobbs-Merrill | OP | Brian Coffey |
| Hanging On | 1973 | M. Evans | OP | |
| Shattered | 1973 | Random House | Berkley | K.R. Dwyer* |
| A Werewolf Among Us | 1973 | Ballantine | OP | |
| Dark Rivers of the Heart | 1994 | Knopf | Bantam | |
| Blood Risk | 1973 | Bobbs-Merrill | OP | Brian Coffey |
| Demon Seed (Original Version) | 1973 | Bantam | OP | |
| The Haunted Earth | 1973 | Lancer | OP | |
| The Dark of Summer | 1972 | Lancer | OP | Deana Dwyer |
| Dance With the Devil | 1972 | Lancer | OP | Deana Dwyer |
| Children of the Storm | 1972 | Lancer | OP | Deana Dwyer |
| Chase (Original Version) | 1972 | Random House | OP | K.R. Dwyer* |
| A Darkness in My Soul | 1972 | DAW | OP | |
| The Flesh in the Furnace | 1972 | Bantam | OP | |
| Starblood | 1972 | Lancer | OP | |
| Every Day’s a Holiday | 2003 | HarperCollins | HarperCollins | |
| Time Thieves | 1972 | Ace | OP | |
| Warlock | 1972 | Lancer | OP | |
| Legacy of Terror | 1971 | Lancer | OP | Deana Dwyer |
| The Crimson Witch | 1971 | Curtis | OP | |
| Demon Child | 1971 | Lancer | OP | Deana Dwyer |
| Anti-Man | 1970 | Paperback Library | OP | |
| Beastchild | 1970 | Lancer | OP | |
| Dark of the Woods | 1970 | Ace | OP | |
| Soft Come the Dragons | 1970 | Ace | OP | |
| Hell’s Gate | 1970 | Lancer | OP | |
| The Dark Symphony | 1969 | Lancer | OP | |
| The Fall of the Dream Machine | 1969 | Ace | OP | |
| Fear That Man | 1969 | Ace | OP | |
| Star Quest | 1968 | Ace | OP |