The Treasure of the Viking Ship: Thea Stilton 3

Colette, Violet, Pamela, Nicky, and Paulina are working on a historical restoration when they learn about an ancient Viking vessel that sank off the shore of Whale Island. Rumor has it that the ship is full of treasure, and what's worse, some shadowy figure is plotting to steal it! If Mouseford's best investigative journalists can't crack this case, Whale Island will lose one of its most important cultural artifacts before it's even found.