Allie and Shoo Spywell is just regular kids-well, sort of. It's just that their dad is an archaeologist, and their mother is a mystery writer. The Spywell kids always seem to get a few more history lessons than they would like. When Allie and Shoo arrive in St. Joseph, Michigan, they expect to have a relaxing vacation on the beach. However, something seems strange about the cottage. Is it haunted by a fisherman drowned in a storm many years ago? And is that a real sailing ship they see in the mist-or is it the legendary ghost ship the Griffin? Join Allie and Shoo in their thrilling adventure as they explore the history and legends of the French explorer LaSalle and his ghost ship, the Griffin, loaded with details of Great Lakes history.