O'DONNELL, ELLIOTT
Dennis Wheatley Library of the Occult
6 1974 Sorcery club

O'DONNELL, KEVIN JR
Journeys of McGill Feighan
1 1981 Caverns
2 1981 Reefs
3 1982 Lava
4 1986 Cliffs

O'DONOHOE, NICK
Crossroads
1 1994 The Magic and the Healing
2 1995 Under the Healing Sign
3 1996 The Healing of Crossroads
Gnomewrench
1 1999 The Gnomewrench in the Dwarfworks
2 2000 The Gnomewrench in the Peopleworks

O'MAHONY, DANIEL
Doctor Who: the Missing Adventures
19 1996 The Man in the Velvet Mask
Doctor Who: the New Adventures
32 1994 Falls the Shadow

O'NEAL, KATHLEEN M.
Powers of Light
1 1990 An Abyss of light
2 1990 Treasure of light
3 1991 Redemption of light

O'NEIL, DENNIS
Batman
1994 Knightfall

O'RIORDAN, ROBERT
Cadre
1 1986 Cadre one
2 1987 Cadre lucifer
3 1988 Cadre messiah

O'SHAUGHNESSY, DARREN
The City
1 1999 Ayuamarca
2 2000 Hell's Horizon

ODOM, MEL
Angel
2000 Redemption
2001 Bruja
2002 Image
Battletech: Mechwarrior
3 1999 By Blood Betrayed
Buffy The Vampire Slayer
1999 Unnatural Selection
2001 Revenant
Diablo
2 2002 The Black Road
Forgotten Realms: Lost Empires
1 1998 The Lost Library of Cormanthyr
Forgotten Realms: The Threat From the Sea
1 2000 Rising Tide 
2 2000 Under Fallen Stars
3 2000 The Sea Devil's Eye 
F.R.E.E.
1 1995 F.R.E.E. Lancers
2 1996 F.R.E.E.FALL
Hercules: the Legendary Journeys: Young Hercules
1999 Young Hercules: a novelisation
Jugh
[ bored apprentice to master librarian Edgewick Lamplighter ]
1 2001 The Rover
2 2004 The Destruction of the Books
3 2005 Lord of the Libraries
Shadowrun
21 1996 Preying for Keeps
27 1997 Headhunter
35 1999 Run Hard, Die Fast

OFFUTT, ANDREW J.
Conan
1981 Conan the mercenary
15 1979 Sword of Skelos (Bantam series #3)
Cormac
(in internal sequence)
1 1977 The Mists of Doom
2 1982 The Tower of death (with Keith Taylor)
3 1980 When death birds fly (with Keith Taylor)
5 1975 Sword of the Gael
6 1982 The Undying wizard
7 1977 The Sign of the moonbow
Thieves' World novel
4 1987 Shadowspawn
1993 The Shadow of sorcery
War of the Gods on Earth
1 1979 The Iron lords
2 1980 Shadows out of hell
3 1983 Lady of the snowmist
War of the Wizards (with Richard K. Lyon)
1 1978 Demon in the mirror
2 1980 The Eyes of Sarsis
3 1981 Web of the spider

OFFUTT, ANDREW J. (ED)
Swords against Darkness
Swords against darkness: 1(1977) - 5 (1979)

OLSEN, PAUL / DAVID SILVA (EDS)
Dell Abyss
12 1992 Postmortem

OLTION, JERRY
Isaac Asimov's Robot City: Robots and Aliens
4 1990 Alliance
6 1990 Humanity
Star Trek
77 1996 Twilight's End
81 1997 Mudd in Your Eye
92 2000 The Flaming Arrow (New Earth 4) (with Kathy Oltion)
Star Trek: the Captain's Table
6 1998 Where Sea Meets Sky (Captain Pike)

OLTION, KATHY
Star Trek
92 2000 The Flaming Arrow (New Earth 4) (with Kathy Oltion)

ORAM, NEIL
Warp
1 1980 The Storm's howling through Tiflis
2 1981 Lemmings on the edge
3 1982 The Balustrade paradox

ORE, REBECCA
Becoming Alien
1 1988 Becoming alien
2 1989 Being alien
3 1990 Human to human

ORMAN, KATE (Australian author)
Doctor Who BBC series
1997 Vampire Science (with Jonathan Blum)
1998 Seeing I (with Jonathan Blum)
1999 Unnatural History (with Jonathan Blum)
2001 The Year of Intelligent Tigers
Doctor Who: the New Adventures
1993 The Left-handed hummingbird
Doctor Who: the New Adventures
35 1995 Set Piece
48 1996 Sleepy
53 1996 Return of the Living Dead
58 1997 The Room With No Doors
60 1997 So Vile a Sin (with Ben Aaronovitch)
New Adventures: New series
10 1998 Walking to Babylon

ORR, A.
World in Amber
1 1985 The World in Amber
2 1986 In the ice king's palace

OSBORNE, CARY
Arden Grenfell
1 1998 Deathweave
2 1998 Darkloom

OWEN, DEAN
Dracula
1960 Brides of Dracula

OWENS, EVERETT
X Files episode novelisation
7 1997 Control
11 1998 Howlers
X Files (young adult series)
14 1998 Regeneration