Earthman, Beware!
Poul Anderson
High Flight
Katherine MacLean
Exile of the Eons
Arthur C. Clarke
Earthman, Beware! & Others
Gateway to Darkness
Fredric Brown
Rogue Ship
A. E. Van Vogt
Centaurus (1)
Child of Void
Margaret St. Clair
Invaders of Earth (8)
This Star Shall Be Free
Murray Leinster
Invaders of Earth (1)