First edition of this collection of three previously unpublished versions of key Asimov works: "Pebble in the Sky," "The End of Eternity," and "Belief." NY: Doubleday & Company, 1986. Octavo (5.75 x 8.5 in.); xii, 272pp.; maroon papered boards, black quarter cloth, in dust jacket. Light bumping to top board corners, else fine in a near fine, unclipped jacket with mild wear at spine ends and tips and faint toning to flaps. An attractive copy.