The Castle of Light
Keith Laumer
Retief (1)
Retief, God-Speaker
Giant Killer
Forest in the Sky
Retief's War
Retief (3)
The Fabulous Riverboat
Philip José Farmer
Riverworld (2)
Three Worlds to Conquer
Poul Anderson
Sam Hall Universe (1)
Operation High Time
Jacqueline Lichtenberg
Sime/Gen (13)
Black Easter
James Blish
The Devil's Day (1)
The Silkie
A. E. Van Vogt
The Silkie (1)
Silkies in Space