When the Green Star Calls

From the back cover of the DAW first edition: "Unknown world for conquest! - To him, his native Earth was a prison of the mind and body. For him, only lure of the wonder world that revolved in the rays of the nameless green star was worth the struggle to live. And finally the call came... But awaiting him was only the body of a primitive youth, while the city of his beloved princess was far away. And once revived, he found himself the puppet of a half-mad experimenter in immortality and the companion of the last living monster of a race that had once been ruler of that world."