The Outstretched Shadow
Mercedes Lackey & James Mallory
Obsidian Trilogy (1)
The Outsider
H. P. Lovecraft
Out of the Darkness
Harry Turtledove
The Darkness (6)
Out of Sight, Out of Mind
Marilyn Kaye
Gifted (1)
Out of Phaze
Piers Anthony
Apprentice Adept (4)
Our Lady of the Fishnet Stockings
Christopher Moore
Our Children's Children
Clifford D. Simak
The Other Worlds
Phil Stong
The Other Wing
Algernon Blackwood
The Other Tales of Conan
Robert E. Howard & L. Sprague de Camp & Lin Carter
The Other Lands
David Anthony Durham
The Acacia Trilogy (2)
The Other Gods
Other Earths
Nick Gevers & Jay Lake
The Osteomancer's Son
Greg van Eekhout
Orphans of Chaos
John C. Wright
The Chaos Chronicles (1)
Orphan's Triumph
Robert Buettner
Jason Wander / Orphan (5)
Orphan's Quest
Pat Nelson Childs
The Chronicles of Firma (1)
Ordermaster
L. E. MOdesitt, Jr.
The Saga of Recluce (13)
The Order War
The Saga of Recluce (4)