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