7Ten-year-old Mandy of Dyer Cove, Maine, and her 12-year-old cousin Nick try to unravel the mystery of strange happenings at the lighthouse. Is it haunted by the first keeper's ghost? An ancient key, a lighthouse legend, a treasure map and a secret code lead them on a search for treasure and a summer of adventure. The Lightkeeper's Key, a spellbinding mystery for readers ages 8-12, will keep kids turning the pages.