- ISBN: 0316358320, 9780316358323
- Page count: 62
- Published: 1974-06-30
- Format: Paperback
- Publisher: Little, Brown Books for Young Readers
In this classic graphic novel: Tintin stumbles across a model ship at the Old Street Market. Only it isn't just any model ship-it's the Unicorn, carved by one of Haddock's ancestors, and it holds a clue to finding pirate treasure!