New York: Macmillan, 1978. First. Hardcover in dust jacket. 8vo. 319pp. Introduction by Theodore Sturgeon. Translated by Patrick L. McGuire. Written as part of Best of Soviet SF series by frequent collaborators and brothers, Soviet science fiction authors Arkady and Boris Strugatsky. H.

New York: Doubleday & Company, 1969. Book Club Edition. Hard cover in dust jacket. 8vo. 202pp. Previous owner name written on blank page preceding pre-title page. In good condition with light fading to dust jacket, some soiling on back jacket cover. Some pages bumped, text unaffected.