The Hardy Boys' Mysteries #36: The Secret of Pirates' Hill

**This is a USED BOOK. It may show some wear and tear. Used books are final sale. No refunds or exchanges.** COVER may be different than what is pictured. Stock images are used.**

In a series of hair raising adventures both on land and undersea the teenage brother detectives pit their wits against some of the most ruthless criminals they have ever encountered. It all starts when Frank and Joe are skin diving just for fun and the thrill of exploring the undersea world. Suddenly, deep in the waters that flow near the foot of Pirates Hill, a mysterious skin diver fires a spear through Franks's air hose. Recommended for ages 8 to 14