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