After Doomsday
Poul Anderson
Industrial Revolution
Flying Mountains (1)
Three Worlds to Conquer
Sam Hall Universe (1)
The Star Fox
Gunnar Heim (1)
The Corridors of Time
The Rebel Worlds
Dominic Flandry (8)
Quinquepedalian
Piers Anthony
Chthon
Aton/Piers Anthony's Worlds of Chthon (1)
Prostho Plus
Dr. Dillingham (1)
SOS the Rope
Battle Circle (1)