Mathes, Miriam. Library Journal 87 (January 14, 1962): 332. Mathes argues that Juster's use of irony and wordplay may make his book too difficult for some young readers.

Maxwell, Emily. New Yorker 37 (November 18, 1961): 222. This lengthy review of the book describes it as "lucid, humorous, full of warmth and real invention."

McGovern, Ann. New York Times Book Review (November 12, 1961): 35.

McGovern's highly-complimentary review compares the book to classic fantasy novels like Alice's Adventures in Wonderland.