First paperback edition of this classic Heinlein novel, combining two novellas ("Universe" and "Common Sense") first published separately by Astounding Science Fiction in 1941.
Fine.
(New York): Signet / New American Library, (1965). 7'' x 4.25''. Original pictorial wrappers, cover price 50c, D2618. All edges tinted red. 128 pages. Minor edgewear, light toning.