Season's Change
Cait Nary
Trade Season (1)
Glory to the Brave
Luke Chmilenko
Ascend Online (3)
Inferno
Travis Bagwell
Awaken Online (10)
Benny and Omar
Eoin Colfer
Benny Shaw (1)
Noble Roots
Drew Hayes
Spells, Swords, & Stealth (5)
NPCs
Spells, Swords, & Stealth (1)
Oathblood
Mercedes Lackey
Valdemar: Vows and Honor (3)
Oathbreakers
Valdemar: Vows and Honor (2)
Oathbringer
Brandon Sanderson
The Stormlight Archive (3)
Obligations Incurred
Blaise Corvin
Delvers LLC (2)
Of Myths and Legends
Michael Chatfield
Emerilia (9)
Off to Be the wizard
Scott Meyer
Magic 2.0 (1)
One More Last Time
Eric Ugland
The Good Guys (1)
One of Our Thursdays Is Missing
Jasper Fforde
Thursday Next (6)
Only Superhuman
Christopher L. Bennett
Only You Can Save Mankind
Terry Pratchett
Johnny Maxwell (1)
The Opal Deception
Artemis Fowl (4)
Orconomics
J. Zachary Pike
The Dark Profit Saga (1)
The Order War
L.E. Modesitt Jr.
The Saga of Recluce (4)
Orion's Hounds
Star Trek: Titan (3)
Orphan Star
Alan Dean Foster
Pip & Flinx (3)
The Other
K.A. Applegate
Animorphs (40)
Outcasts of Order
The Saga of Recluce (19)
Outland
Dennis E. Taylor
Quantum Earth (1)
Overtime
Tom Holt
Owlknight
Valdemar: Owl Mage Trilogy (3)
Owlsight
Valdemar: Owl Mage Trilogy (2)
Owner's Share
Nathan Lowell
Golden Age of the Solar Clipper (6)
Pandora's Star
Peter F. Hamilton
Commonwealth Saga (1)