The Starchild Trilogy
Frederik Pohl & Jack Williamson
Starchild (1)
The Best of Frederik Pohl
Frederik Pohl
Critical Mass
C. M. Kornbluth & Frederik Pohl
Empire
H. Beam Piper
Federation (1)
If This Goes On
Charles Nuetzel
Perilous Dreams
Andre Norton
Wizards' Worlds
A Hole in Space
Larry Niven
All the Myriad Ways
Merlin's Godson
H. Warner Munn
Merlin's Godson (1)