The Pirate Train tells the story of the Yo-Ho-Matey family whose youngest son upsets their pirating plans (he gets seasick), and they have to re-imagine their life as a result. In the first book, the Yo-Ho-Matey family buys their train and travels to Crater of Diamonds State Park in Arkansas to dig for treasure, but each book features a new adventure that further develops the characters and highlights fun destinations for treasure-seekers.