Unknown Author
50 books on BookOwl
Books by Unknown Author

Book of Vile Darkness
2002

Vecna Reborn
1998

Dungeon Master's Guide
2000

Monster Manual
2000

Night Clave
2018

Numenera
2018

Cypher System Rulebook
2015

Ninth World Guidebook
2015

Monte Cook's Ptolus
2007

Vault of the Iron Overlord
2007

Monte Cook's World of Darkness
2007

Monster Manual
2006

D20 Dark Matter
2006

Ptolus The Night of Dissolution (Malhavoc)
2006

Monte Cook's Arcana Evolved
2006

Monte Cooks Arcana Evolved
2005

Monte Cooks Presents The Year's Best D20 (Sword & Sorcery)
2005

The Dragons Return
2005

Chaositech
2004

Children of the Rune
2004

The Complete Book of Eldritch Might
2004

Ghostwalk (Dungeons & Dragons d20 3.0 Fantasy Roleplaying Campaign)
2003

Dungeons & Dragons Core Rulebook Set (Dungeons & Dragons d20 3.5 Fantasy Roleplaying, Three Book Slipcased Set)
2003

The Diamond Throne (Arcana Unearthed Sourcebook)
2003

DM's Screen and Player's Guide (Arcana Unearthed Game Accessory)
2003

Arcana Unearthed
2003

Book of Eldritch Might III
2003

The Book of Hallowed Might (Sword and Sorcery S20)
2003

Call of Cthulhu (d20 Edition Horror Roleplaying, WotC)
2002

Demon God's Fane (D20 Generic System)
2002

Queen of Lies
2002

Return to the Temple of Elemental Evil (Dungeons & Dragons d20 3.0 Fantasy Roleplaying Adventure, 4th to 14th Levels)
2001

The Book of Eldritch Might (Sword Sorcery)
2001

Player's Handbook
2000

The Glass Prison
1999

Creatures & Monsters
1999

The Inner Planes (AD&D/Planescape)
1998

Monstrous Compendium, Appendix III (Planescape; Advanced Dungeons & Dragons, 2nd Edition, Accessory/2635)
1998

Faction War (AD&D/Planescape Adventure)
1998

Tales from the Infinite Staircase
1998

A Paladin in Hell
1998

The Great Modron March (AD&D/Planescape)
1997

A Heros Tale
1996

Windriders of the Jagged Cliffs (Dark Sun Adventure/Accessory)
1995

Planes of Conflict
1995

Labyrinth of Madness (AD&D Fantasy Roleplaying Adventure)
1995

Gamer's Handbook of the Marvel Universe, Mu9
1993

A Guide to the Astral Plane (AD&D Fantasy Roleplaying, Planescape)
1991

Dark Space
1990

Heroes and Rogues (Rolemaster, 2nd ed, Stock No. 1420)
1990