Fury - Henry Kuttner

The Earth is long dead, blasted apart, and the human survivors who settled on Venus live in huge citadels beneath the Venusian seas in an atrophying, class-ridden society ruled by the Immortals - genetic mutations who live a thousand years or more. Sam Reed was born an immortal, born to rule those with a normal life-span, but his deranged father had him mutilated as a baby so that he wouldn?t know of his heritage. And Sam grew up on the wrong side of the tracks and the law, thinking of the Immortals as his enemies. Then he reached the age of eighty, understood what had happened to him and went looking for revenge - and changed his decaying world forever.