An alternate cover for this isbn can be found here.
John Truck was to outward appearances just another lowlife spaceship captain. He peddled drugs when they were available, carried cargo when they weren't. But he was also the last of the Centaurans - or at least, half of him was - which meant that he was the only person who could operate the Centauri Device, a sentient bomb which might hold the key to settling a vicious space war.
Cover illustration: Chris Moore