Five Go to Smuggler's Top

Are there still smugglers at Smuggler's Top? The Famous Five go to stay at the large, old house and discover secret hiding places and underground tunnels! Then they catch people signalling out to sea - who can these smugglers be? The Famous Five are Julian, Dick, George, Anne and, of course, Timmy the Dog. They find adventure and excitement wherever they go! How will they solve this mystery?