Publisher's Synopsis
Perce and Andy are worried when their new teacher, Ms Dusa, has a very odd effect on her pupils - she turns them to stone! Perce and Andy know they must stop her before she turns the whole school into statues, but how? They scour the books in the library and discover that their teacher is a monster straight from a Greek myth - she is Medusa and her look is turning all the children into stone. With the imaginative use of mirror sunglasses, Perce and Andy succeed in rescuing their friends and give Ms Dusa a taste of her own medicine.
