The Warlock in Spite of Himself
Christopher Stasheff
Warlock (1)
Warlock of the Witch World
Andre Norton
Witch World Series 1: The Estcarp Cycle (4)
The Lavalite World
Philip José Farmer
World of Tiers (5)
The Gates of Creation
World of Tiers (2)
Makers of Universe
World of Tiers (1)