About the Book: Thea Stilton and the Mountain of Fire Theas friends the Thea Sisters take off for Australia to solve a mystery. A flock of sheep at Nickys familys ranch is losing all its wool, and the ranch depends on the wool to stay afloat! Maybe the sheeps cure lies in an Aboriginal medicine containing a strange root. The five mouselings set off on a tour of the whole country to find out. Its a truly memorable outback adventure! Geronimos adventurous sister Thea narrates this fabulous adventure thats packed with action, mystery, and friendship! Theas friends the Thea Sisters take off for Australia to solve a mystery. A flock of sheep at Nickys familys ranch is losing all its wool, and the ranch depends on the wool to stay afloat! Maybe the sheeps cure lies in an Aboriginal medicine containing a strange root. The five mouselings set off on a tour of the whole country to find out. Its a truly memorable outback adventure!