The Sitters
Clifford D. Simak
Shadow World
Operation Stinky
Honorable Opponent
The Spaceman's Van Gogh
Worlds Without End (2)
Mirage
Strangers In The Universe (2)
Target Generation
Strangers In The Universe (1)
Full Cycle
Worlds Without End (3)
Idiot's Crusade
Shadow Show
Strangers In The Universe (7)
Kindergarten
Retrograde Evolution
Strangers In The Universe (5)
Beachhead
Strangers In The Universe (3)
The Fence
Strangers In The Universe (6)
Ring Around the Sun
Citadel of Darkness
Robert Silverberg
Collision Course
Stepsons of Terra
Ace Double (311)
The 13th Immortal
Ace Double (223)
The Planet Killers