During a marine biology lesson at Mouseford Academy, the Thea Sisters learn about a mysterious shipwreck off Whale Island. According to legend, a very rare diamond called Jasmine's Heart was on the ship when it sank. When biology teacher Professor Van Kraken disappears, the Thea Sisters have to dive into the deep ocean to find him and the jewel. And just when they think their adventures are over, the Thea Sisters receive an invitation to travel to China to find another missing treasure. It's an adventure these five world-traveling mice will never forget!

About the Author

Born in New Mouse City, Mouse Island, Geronimo Stilton is Rattus Emeritus of Mousomorphic Literature and of Neo-Ratonic Comparative Philosophy. He is the director of The Rodent's Gazette, New Mouse City's most widely read daily newspaper.

Stilton was awarded the Ratitzer Prize for his scoops on The Curse of the Cheese Pyramid and The Search for Sunken Treasure. He has also received the Anderson 2001 Prize for Personality of the Year. One of his bestsellers won the 2002 eBook Award for world's best ratling electronic book. In 2006 he won the Nickelodeon Kids Choice Awards and in 2008 he won the Cartoomics prize 'Beyond Comics'. His works have been published all over the globe.

In his spare time, Mr. Stilton collects antique cheese rinds. But what he most enjoys is writing books where he tells his fabmouse adventures!