Hurricanes have uncovered many things over the years, for three brothers the latest hurricane uncovers a mystery that takes them on a journey along Alabama's Gulf Coast. Join the family as they unlock the secrets of Mystery Rock. You can have your own Mystery Rock adventure. Letterboxes have been hidden in four of the locations from the book. The clues are included in the book and a special page for adding the stamp image is also included. Begin your Mystery Rock adventure today.