Darkness and Dawn
Andre Norton
After the Apocalypse (3)
Pursued by the Dragon Alien
Ella Blake
Zarux Dragon Brides (4)
Far Rainbow / the Second Invasion From Mars
Arkady Strugatsky & Boris Strugatsky & Gary Kern
Time Patrol: A Time Patrol Book
Poul Anderson
Time Patrol (5)
A Few Cyborgs More
Honey Phillips
Cyborgs on Mars (4)
A Fistful of Cyborg
Cyborgs on Mars (3)