Auzou Book for animal mission tome 4 koalas to save

Félix and Thelma are off to Australia to visit a friend of Félix's mother: finally a holiday for them and their agency "SOS Mission animals"! Really? Because when their host's daughter, Rose, tells them that the koalas' habitat is going to be destroyed by a property developer, they don't hesitate for a second: Animal Mission is back in action!