Book 2 - Mammoth Cave and the Mystery of the Lake Diamonds

While touring the Mammoth Cave with their parents, Mia and Liam befriend a young boy, Kyle, who is secretly hiding his Chihuahua in his backpack. After the excursion, just before parting ways, Kyle shares a map, revealing his family’s next destination in search of his grandfather’s buried time capsule. Mia realizes the location is near their home in Tennessee and wonders if she and Liam could assist Kyle in finding the missing treasure.