When Captain Carlsen entered the vast derelict spaceship, he was stunned by the discovery of its immobilized passengers. Later, after three of those strange aliens had been transported to Earth, his foreboding was more than justified. The creatures were energy vampires whose seductive embraces were fatal, whose lust for vitality was boundless. As they took over the willing bodies of their victims and sexual murders spread terror throughout the land, Carlsen worked toward their destruction-even wile he fought the erotic pull of the most beautiful, most seductive of their number-back cover.