Needle : Needle Book 1

Bok av Hal Clement
Two ships race in from outer space and crash in the Pacific Ocean. One contains a hunter, entrusted with a vital mission. The other, his quarry - corrupt, evil, a criminal from an unearthly civilisation light years away. Yet both these creatures had one thing in common - they were unable to exist alone. Each needed a host, a human body they could invade and control.