1969 The Hardy Boys: The Secret Panel Book #25 Hardcover Book 8925

25. The Hardy Boys The Secret Panel ISBN 0-448-08925-4 ©1969 Grosset & Dunlop In fantastic vintage condition. Slight wear on corners and a red dot on the bottom edge of the pages. Spine in not broken and has no creasing. 8. The Mystery of Cabin Island ©1966 also available in fantastic condition at time of listing.