While more hackneyed and contrived than some of its author's earlier books, [The More the Merrier] will be welcomed by Beany's many fans. Left with her brother Johnny while their parents are in Mexico, Beany decides to turn the big Malone home into a boardinghouse, thereby earning enough to make a rumpus room in the basement. Although her boarders … bring the kindhearted Beany more problems than profits, the summer ends happily for everyone concerned. (p. 160)

Barbara Joyce Duree, in The Booklist and Subscription Books Bulletin (reprinted by permission of the American Library Association; copyright 1958 by the American Library Association), November 15, 1958.