From Robert Silverberg’s “Earthmen and Strangers” anthology, 1966: The Budrys story depicts meek, peaceful alien beings, intelligent but simple. Now we meet a very different sort of creature: a ravenous beast out of nightmare, rippling with strength, coursing with barely repressed violence. Yet Harlan Ellison’s Lad-nar and Algis Budrys’ Tylus both regard the Earthmen who visit them as supernatu...