Each of the pirates has a map of Barracuda Bay that readers use to follow the pirates from island to island around the bay. Only one of the captains has the clue that leads to the treasure. Which pirate captain is it? Map-reading and route-finding skills are introduced, as well as the concepts of coordinates and compass points. In addition to the main game, there are 12 individual puzzles to solve plus a spotting game, all of which lead the reader around the book.