The Clue of the Tapping Heels (The Nancy Drew Mysteries, Book 16)

214 pp. Russell H. Tandy frontispiece. Pictorial endpapers. Last book listed on book list: The Sierra Gold Mystery. "Carolyn Keene is the pseudonym of the author(s) of the Nancy Drew mystery stories and The Dana Girls mystery stories, both produced by the Stratemeyer Syndicate. In addition, published a Nancy Drew spin-off, River Heights."