Thea Stilton and the Ghost Of The Shipwreck #3

There's a haunted shipwreck off Whale Island, and a rare diamond was lost when the ship sank. When the Thea Sisters biology professor disappears, the mice have to dive deep into the ocean to find him-and hopefully recover the princess jewel! And just when they think their adventures are over, the five mice are invited to China to search for another lost treasure!