Book Title | Cover Artist | Publisher | Year | ||||||
Doomsday on Ajiat | Gray Morrow | Ace | 1968 | BUY | |||||
The Planet of the Double Sun | Gray Morrow | Ace | 1967 | BUY | |||||
Space War | Gray Morrow | Ace | 1967 | BUY | |||||
The Sunless World | Gray Morrow | Ace | 1967 | BUY | |||||
Twin Worlds | Gray Morrow | Ace | 1967 | BUY |