The Game of Rat and Dragon (Unabridged‪)‬

Future humanity has found the secret of faster-than-light travel, but it comes with great dangers. To minimize these dangers, man can pilot ships through the up-and-out with cats as their partners. Underhill shares his mind with his cat-partner, the Lady May, and must travel to the terrible open places between the stars. Only by working together can they defend themselves and the ship's passengers against the dragons in the emptiness of space.