Five Go to Demon's Rocks by Enid Blyton - USED

Five go to demon's rocks: Is there any treasure on Demon's Rocks? Or is it just a myth? The Famous Five decide to explore the surrounding caves. Then they find a gold coin--and the myth becomes all too real... Five on a treasure island: A shipwreck off Kirrin Island means there must be treasure! But the Famous Five aren't the only ones who are on the hunt for the treasure...