The World Set Free
H. G. Wells
The World Peril of 1910
George Griffith
The World Outside
Robert Silverberg
Urban Monad (1)
A World Out of Time
Larry Niven
State (1)
World Out of Mind
J. T. McIntosh
The World on Blood
Jonathan Nasaw
James Whistler (1)
World of Wonders
Robertson Davies
Deptford Trilogy (3)
World of Wonder
Fletcher Pratt
A Private Cosmos
Philip José Farmer
The World of Tiers (3)
The Gates of Creation
The World of Tiers (2)
The Maker of Universes
The World of Tiers (1)
The World of the War God
Stories of Other Worlds (1)
World of the Starwolves
Edmond Hamilton
Starwolf (3)
World of the Sleeper
Tony Russell Wayman