Racine, WI: Whitman, (1956.). Hardcover - The 5th and last book in this series by the author who is best known for the early Trixie Belden books. Ginny and her friends have a club called the Hustlers, and they operate a bookstall where they rent books. As this mystery begins they are preparing for a used booksale, and a rare book which was accidently included among the donations is missing. Illustrated by Margaret Wesley. 282 pp plus 2 pp publisher's ads.