Planetary Agent X
Mack Reynolds
United Planets (1)
Dawnman Planet
United Planets (2)
Amazon Planet
United Planets (5)
The Rival Rigelians
United Planets (3)
Computer War
Depression or Bust
Depression or Bust (1)
Mercenary from Tomorrow
Joe Mauser (1)
Code Duello
United Planets (4)
Earth Unaware
The Space Barbarians
The Five Way Secret Agent
Lagrange (1)