Don't miss this expanded novelization of the action-packed film! After buying a model of the Unicorn, young reporter Tintin discovers a secret message hidden inside the mast of the ship. But what does it mean? Who are the three brothers, and why does it mention three Unicorns when there was only one vessel with that name? The clues start to pile up as Tintin and his faithful dog Snowy find themselves sailing, flying and riding camels around the globe on an epic adventure! Hot on the trail of the story, Tintin meets the hearty seadog Captain Haddock. Can the adventurers solve the mystery before the secret lands in the wrong hands?