Five on a treasure island

Julian, Dick, Anne, George and Timmy the dog find excitement and adventure wherever they go in Enid Blyton's most popular series. In their first adventure, the Famous Five find a shipwreck off Kirrin Island. But where is the treasure? The Famous Five are on the trail, looking for clues, but they're not alone. Someone else has got the same idea! Time is running out for the Famous Five -- who will follow the clues and get to the treasure first?