Michael Oechsle Book order

Lucas has just lost his father in Afghanistan and to help him cope, his grandmother sends him to Camp Kawani. While there, he learns of the lost treasure of Thomas Jefferson Beale, a local legend of a hoard of gold buried in the mountains 200 years ago. The location is encrypted in a set of codes no one has ever been able to decipher. Lucas becomes obsessed with finding the gold to save his home and leads his newfound friends into a dangerous mission into the wilderness to uncover it.