New York: Atheneum, 1962. hardcover. 4 volumes. 8vo, cloth, d.w. New York: Atheneum, 1962, 1965, 1969, 1973.
Four volumes comprising the complete series. The last two volumes are first editions. The dust wrappers on the first two volumes are lightly rubbed on the edges. The dust wrapper on the third volume is lightly soiled. The back inner flap of the dust wrapper of fourth volume is creased.