Although there are some very funny moments in [Freddy's Book], it isn't quite convincing in constructing a situation in which so many people do a bad job of giving information; that enables the author to make a long story out of Freddy's quest, but the contrivance weakens the story, and it's noticeable that all the female characters are remarkable for their ineptitude. Although purposive, this sex education book may be of comfort to youngsters (Freddy seems to be about 11 or 12) who are embarrassed because they don't know what it's all about—but how many boys of this age don't?

Zena Sutherland, "New Titles for Children and Young People: 'Freddy's Book'," in Bulletin of the Center for Children's Books (© 1974 by the University of Chicago; all rights reserved), Vol. 27, No. 7, March, 1974, p. 116.