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