Deathworld 2
Harry Harrison
Deathworld (2)
The Lords of Quarmall
Fritz Leiber & Harry Fischer
Fafhrd and the Gray Mouser (1)
Star Surgeon
James White
Sector General (2)
Space Viking
H. Beam Piper
Space Vikings (1)
Junkyard Planet
Poictesme (1)
Judgment on Janus
Andre Norton
Janus (1)
No Great Magic
Fritz Leiber
Change War (1)
The Great Time Machine Hoax
Keith Laumer
Beyond the Barrier
Damon Knight
Martian Time-Slip
Philip K. Dick