Spectrum: A Science Fiction Anthology [with] Spectrum: A Second S.F. Anthology

London: Victor Gollancz Ltd., 1961 & 1962. First Editions. Octavos (20 cm); publisher’s cloth in bright yellow dust jackets printed in black and plum, retaining original prices and white promotional bands; 304pp; 271pp. First volume has "File Copy" stamped on front and rear jacket panels, as well as front flap, with a small, faint dampstain to front pastedown near tail. Both dust jackets a bit dust-soiled with creases, bumps, and tiny chips to margins and spine ends (though portions protected by wrap-around bands notably clean). A few small dents to board margins, light dust-soil to textblock edges, else a Very Good, bright and sound set. A pair of anthologies with stories from some of science fiction’s most celebrated authors of the era, including Philip K. Dick, Robert A. Heinlein and Isaac Asimov, underlining the peak of the genre during the Atomic Age. N.B.: "Vintage Season," the last story in Spectrum II, is erroneously credited solely to Henry Kuttner. In reality he originally wrote the story in partnership with his wife, author C. L. Moore, under the joint pseudonym "Lawrence O’Donnell." It is suspected that "Vintage Season" was written almost entirely by Moore.…