Get ready for some thrilling mystery with this lot of 2 Hardy Boys books. The set includes book number 31, "The Secret of Wildcat Swamp," and book number 54, "The Mysterious Caravan." Written by Franklin W. Dixon, these books will take you on a wild ride filled with suspense and adventure.

Perfect for fans of mystery genre, these books are written in English and are a must-have for any book lover's collection. Don't miss out on the chance to own these exciting stories!