Science Fiction Book Club: (May) 1964 hardcover (Putnam hardcover was also 1964; the true first edition was 1963 in Britain.) Jacket design by Irv Docktor, 187 pages. Condition is VG+ or better in a VG+ to near-Fine dustjacket. Book is tight with mild (1/8") tilt; the usual light bumping to spine ends; bump-trace at lower right corner of front cover; age tanning is mild and uniform (condition is quite decent for its vintage.) No stamps, marks or writing - a clean copy. Unclipped DJ has light wear at top of spine, top corner of front flap, outside fold of back flap; a little bit of accumulated dirt on back cover next to spine (see scans.) [Most scans were made with DJ protector in place, and I include an extra view without protector - so you can judge how much or whether the protector improves the look.]

Orphans of the Sky - usually marketed as a novel, this is actually 2 related stories - which are listed at the end of the "Future History" chart. The original novelets appeared in Astounding in 1941.

Universe
Common Sense.

Back beyond the memory of any living on board was a great Mutiny in which the Captain and his officers perished. From that time it had been the duty of the scientists to promulgate the sublime laws of Jordan's Plan, to interpret such sacred books as Basic Modern Physics, to instruct the young in the ways of the Ship. The Ship is a giant sealed cylinder 5 miles long, with concentric decks, labyrinthine passages, acres of farmland, living area and work space. To novice scientist Hugh Hoyland it was the only world that existed - until one day he ventured into the weightless regions where the monstrous "muties" lived. There he learned the truth that had died with the first Captain and Crew… the true nature of the Ship.