Who? is a 1958 science fiction novel by American writer Algis Budrys, set during the Cold War. It was originally a short story, inspired, as its author claimed, by a Kelly Freas painting he had seen in the offices of the magazine Fantastic Universe, and published in that magazine in April 1955.
It was there on the dark side of the Moon, waiting for the first human explorers to discover it -- an alien formation, a trap for the unwary, a place into which many men would venture but from which none would return.
Michaelmas (1977) is a science fiction novel by American writer Algis Budrys, first published as a serial in The Magazine of Fantasy & Science Fiction in August and September 1976, and published in revised form as a novel in 1977.