Horizontal Man. Finnegan Zwake #1

A 13-year-old boy and his mystery-writer uncle are featured in this first of three suspense novels that revolve around adventures in exotic locales. Finnegan is staying with his uncle, hoping his parents will return from Ireland, where they disappeared several years ago during an archaeological expedition. When the boy discovers a body in his basement, he and his uncle end up searching for missing Mayan gold artifacts.