Contamination Crew
Alan E. Nourse
Second Sight
The Invaders Are Coming!
Alan E. Nourse & J. A. Meyer
Ace Double (366)
The Native Soil
The Coffin Cure
Infinite Intruder
An Ounce of Cure
My Friend Bobby
The Link
Scavengers in Space
Rocket to Limbo
Brightside Crossing
Peacemaker
Marley's Chain
The Universe Between
The Universe Between (1)
Hard Bargain
Tiger by the Tail
Daybreak—2250 A.D.
Andre Norton
Ace Double (69)
The Time Traders
Ross Murdock / Time Traders (1)
Star Guard
Central Control (2)