After a slow-moving start [Below the Root] gathers speed and moves along with suspense to a not quite satisfactory end—one which certainly calls for a sequel…. There are long passages of description and explanation establishing Green Sky as a believable world, and though at times the allegory is a little heavy-handed, this is still an interesting suspenseful fantasy.

Matilda Kornfeld, "The Book Review: 'Below the Root'," in School Library Journal (reprinted from the September, 1975 issue of School Library Journal, published by R. R. Bowker Co./A Xerox Corporation; copyright © 1975), Vol. 22, No. 1, September, 1975, p. 112.