The Castle of Iron
L. Sprague & Pratt de Camp
Incomplete Enchanter (2)
L. Sprague de Camp & Fletcher Pratt
Crisis
Edward Grendon
Invaders of Earth (17)
Castaway
Robert Moore Williams
Invaders of Earth (2)
Not Only Dead Men
A. E. Van Vogt
Invaders of Earth (12)
The Man in the Moon
Henry A. Norton
Invaders of Earth (20)
Symbiotica
Eric Frank Russell
Jay Score/Marathon (3)
Mechanistria
Jay Score/Marathon (2)
Jay Score
Jay Score/Marathon (1)
To Run the Rim
A. Bertram Chandler
John Grimes Rimworld (1)
The Emancipated
L. Sprague de Camp
Johnny Black (3)
The Incorrigible
Johnny Black (2)
The Command
Johnny Black (1)
The Exalted
Second Game
Katherine MacLean & Charles V. De Vet
Kalin Trobt (1)
The Witches of Karres
James H. Schmitz
Karres (1)
Fury
Henry Kuttner & C. L. Moore
Keeps (2)
Clash by Night
Keeps (1)
Methuselah's Children
Robert A. Heinlein
Lazarus Long (1)
One Against the Legion
Jack Williamson
Legion of Space (3)