ELSEWHERE! Professor John Zanthar, brilliant electronics specialist, walked around the advanced, compact cyclotron he had designed . . . and vanished. Some strange, subatomic energy vortex lifted him, twisted him, and seemed to translate him . . . into another world. Zanthar found himself on the strange planet Letar, where all his knowledge of science availed him not at all against the alien foes and forces he had to battle. For he landed in the middle of an all-out, primitive war - and he had to choose sides immediately and fight back strenuously . . . for his own life and those of his new allies, with the only weapons his naked hands could muster. Zanthar was a fighting man as well as a scientist. He knew no fear, and he knew he could win out over anything he could see and feel. But then he was followed from Earth by the sinister Fu Cong, and he began to learn what real war was . . .