Horror

• The Djinn
• The Sphinx
• Charnel House
• The Devils of D-Day
• The Hell Candidate
• The Heirloom
• The Wells of Hell
• Tengu
• The Pariah
• Family Portrait (based on Oscar Wilde's novel The Picture of Dorian Gray. Also published as Picture of Evil)
• Death Trance
• Mirror
• Ritual
• Walkers
• Black Angel (also published as Master of Lies)
• The Hymn (also published as The Burning)
• Prey (based on H. P. Lovecraft's short story "The Dreams in the Witch House")
• The Sleepless
• Flesh & Blood
• Spirit
• The House That Jack Built
• The Chosen Child
• House of Bones
• The Doorkeepers
• Hair Raiser
• Trauma
• The Hidden World
• The Devil In Gray
• Unspeakable
• Descendant (only, so far, published volume of a proposed Vampire Hunter series)
• Edgewise
• The 5th Witch
• Ghost Music
• Basilisk (only, so far, published volume of a proposed Basilisk series)
• Fire Spirit
• Petrified

Manitou series

1. The Manitou
2. Revenge of the Manitou
3. Burial
4. Spirit Jump (short story)
5. Manitou Blood
6. Blind Panic

Night Warriors series

1. Night Warriors
2. Death Dream
3. Night Plague
4. Night Wars
5. The Ninth Nightmare

Rook series

1. Rook
2. Tooth and Claw
3. The Terror
4. Snowman
5. Swimmer
6. Darkroom
7. Demon's Door
8. Ultimate Evil

Historical fiction

• Heartbreaker
• Rich
• Railroad
• Solitaire
• Corroboree
• Maiden Voyage
• Lady of Fortune
• Headlines
• Silver
• Lords of the Air
• Empress

Thrillers

• Fireflash 5 (also published as A Mile Before Morning)
• Plague
• The Sweetman Curve
• Famine
• Ikon
• Condor
• Sacrifice
• Genius
• Holy Terror
• Katie Maguire
• Innocent Blood
• Chaos Theory
• Rules of Duel

Sissy Sawyer series

1. Touchy and Feely (based on the Beltway snipers)
2. The Painted Man (also published as Death Mask)

Short stories

• Absence of Beas
• Anaïs
• A Polite Murder
• The Ballyhooly Boy
• Beijing Craps
• Bridal Suite
• The Burgers of Calais
• Camelot
• Changeling
• Cold Turkey
• Eau Noire
• Egg
• Eric the Pie
• Ever, Ever After
• Evidence of Angles
• Fairy Story
• 5A Bedford Row
• Friend in Need
• The Grey Madonna
• Grease Monkey
• Grief
• The Heart of Helen Day
• Heart of Stone
• Heroine
• The Hungry Moon
• Hurry Monster
• I, The Martian
• J.R.E. Ponsford
• Jack Be Quick
• The Jajouka Penis-Beetle
• Laird of Dunain
• Lolicia
• Making Belinda
• Men of Maes
• Mother of Invention
• Neighbors From Hell
• Out of Her Depth
• Picnic at Lac Du Sang
• Pig's Dinner
• Roadkill
• Rococo
• The Root of All Evil
• Rug
• Saint Joan
• Saving Grace
• The Scrawler
• The Secret Shih-Tan
• Sex Object
• The Sixth Man
• Son of Beast
• Spirit Jump
• Spirits of the Age
• St. Bronach's Branch
• Suffer Kate
• The Sympathy Society
• The Taking of Mr. Bill
• Underbed
• Voodoo Child
• Will (Cthulhu Mythos pastiche, features Yog-Sothoth)
• The Woman in the Wall

Sex instruction books

• Acts of Love
• Your Erotic Fantasies
• Girls Who Said Yes
• How a Woman Longs to be Loved
• How to be the Perfect Lover
• Isn't It Time You Did Something Kinky?
• Sex is Everything
• How to be a Good Bad Girl
• Women's Erotic Dreams
• 1,001 Erotic Dreams Interpreted
• How to Drive Your Man Wild in Bed
• How to Drive Your Woman Wild in Bed
• The High Intensity Sex Plan
• More Ways to Drive Your Man Wild in Bed
• Sex Secrets of the Other Woman
• How to Drive Your Lover Wild in Bed
• How to Make Love Six Nights a Week
• Wild in Bed Together
• Drive Him Wild
• Single, Wild, Sexy ... and Safe
• How to Drive Your Man Even Wilder in Bed
• How to Make His Wildest Dreams Come True
• Secrets of the Sexually Irresistible Woman
• The Seven Secrets of Really Great Sex
• The Secrets of Sexual Play
• Wild Sex for New Lovers
• Up All Night