The Skin Diving Mystery (Paperback) (ISBN-13: 9781479427826)

THE SKIN DIVING MYSTERY is the story of four boys and a girl who belong to a skin-diving club. They have a wonderful time studying shells and marine animals together. But one day, a rare shell discovered by one of the members disappears. Then they all must concentrate on Operation Rare Shell to get it back. Jerry's "Sea Animal Log" which is included at the back of the book.