[Cecily is an] almost flawless novel…. Several of the mistresses of Langley School, the girls who play even small parts in Cecily's misery or reclamation, and certainly the main characters are so well understood, so alive, that they demand the reader's complete involvement. A beautifully polished gem of a novel … that will be a relief from tired stories written especially for teen-agers.

Ruth Hill Viguers, "'Cecily'," in The Horn Book Magazine (copyright © 1967, by The Horn Book, Inc., Boston), Vol. XLIII, No. 3, June, 1967, p. 353.