(CHILDREN'S LITERATURE.) O'BRIEN, ROBERT C. Mrs. Frisby and the Rats of NIMH. Illustrated by Zena Bernstein. 8vo, publisher's grey cloth stamped in purple, tiny ink mark to top of front board; unclipped dust jacket, Newbury Award sticker to front panel, flaps creased, spine panel faded with minor wear to head, scattered light soiling; ownership signature to front flyleaf, else contents clean. First edition. New York: Atheneum, 1971