Three Hearts & Three Lions
Poul Anderson
Operation Chaos
Three in time
Wilson Tucker & Poul Anderson & Chad Oliver
Genesis
The Stars Are Also Fire
Agent Of The Terran Empire
The Boat of a Million Years
David Falkayn: Star Trader (Technic Civlization)
Ensign flandry
Operation Luna
Starfarers
The Man Kzin Wars (Man Kzin Wars, Book 1)
Larry Niven & Poul Anderson & Dean Ing
Man-Kzin Wars (1)
Inconstant star
The High Crusade
Avatar, The
After Doomsday