The World Swappers
John Brunner
World Soul
Mikhail Emtsev & Eremei Parnov
The World Shuffler
Keith Laumer
Lafayette O'Leary (2)
The World She Wanted
Philip K. Dick
The Last War: A World Set Free
H. G. Wells
The World Set Free
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)