Who has squashed our bookshelf? Our teacher asks us all Someone's bitten the board in two! There are claw marks on the wall! For one little boy a regular day at school is turned upside down A band of dinosaurs are there to wreak havoc in the classroom but the grown-ups can't see them! Can he convince the dinosaurs to behave? Prepare for a school day that is far from ordinary in this hilarious new picture book from the bestselling author & illustrator team behind DINOSAURS IN THE SUPERMARKET