A boisterously funny new picture book from David Walliams and Adam Stower, perfect for young dinosaur fans! One night, Spike creeps downstairs in his pyjamas to find that his granny has turned into a dinosaur - GRANNYSAURUS! There are dinosaurs BOOGYING in the living room. With Brontosaurus, Stegosaurus and Giganotosaurus, it's a DINO DISCO! Spike wants to stay up and party too! How will Grannysaurus ever get him back to bed? Perhaps her next guest, Tyrannosaurus Rex, can help? Children will love to dance their way to bedtime with this exciting story full of spectacular surprises!