Although Jessica's overwrought imagination lends a quality of suspense to [The Witches of Worm], the resolution is limp and unsatisfying. The author of The Egypt Game and The Headless Cupid, in both of which suspense is skillfully maintained by the give and take of children brought together, has possibly wandered beyond her depth in an attempt to rationalize witchcraft.

Paul Heins, "Christmas Booklist: 'The Witches of Worm'," in The Horn Book Magazine (copyright © 1972 by The Horn Book, Inc., Boston), Vol. XLVIII, No. 6, December, 1972, p. 596.