Thea Stilton and the mountain of fire /
Mountain of fire.
Geronimo Stilton.
- New York : Scholastic, c2009.
- 159 p. : col. ill., col. maps ; 20 cm.
- Geronimo Stilton .
A flock of sheep at Nicky's family's Australian ranch was losing all its wool, and no one knew why. Nicky and her friends the Thea Sisters headed to Australia and set off on a tour of the whole country in serch of clues.