Pyjamas are just pyjamas. Right?Not when they’re COSMIC PYJAMAS!Something STRANGE has happened to Rosie and her brothers! Rosie’s new pyjamas have led them to a dangerous discovery . . .Doctor Starkly-Bonkershas invented the DOOMBUSTER and history is all muddled up – and now the machine has been STOLEN! Can Rosie and the boys beat the Pharaohs and dinosaurs and will rice pudding REALLY stop the Vikings?