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-Bonkers has 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?