Bøker i Geronimo Stilton: Thea Stilton-serien

In this 36th volume in the series, "the Thea Sisters are going to New Zealand. Their new friend Charlotte wants to show them the sights and introduce them to Didi, a skeleton of a bird that went extinct many years ago. But when they get to the mouseum, Didi has gone missing. Can they find the stolen skeleton before it is too late?"--