The cast from the Newbery-award novel, "A Wrinkle in Time" and "A Wind in the Door" returns [in "A Swiftly Tilting Planet"] with the Murry children now grown…. Shivery and elegant twists of plot ensue as Meg and Charles Wallace employ time travel, telepathy, a Welsh rune and other means to prevent annihilation of the universe by a mad dictator. L'Engle's gifts are at their most impressive here. Her ability to draw attention to familiar details of settings and characters is such that she slips searingly abstract scientific and moral principles into the reader's consciousness, smoothly but surely. (p. 65)

Jean F. Mercier, in Publishers Weekly (reprinted from the July 3, 1978, issue of Publishers Weekly by permission of the critic, published by R. R. Bowker Company, a Xerox company; copyright © 1978 by Xerox Corporation), July 3, 1978.

L'Engle's irksomely superior Murry family reassembles [in A Swiftly Tilting Planet] for Thanksgiving dinner, about ten...