Notes

114 pages :colour illustrations.
Summary: It's a Jurassic super-emergency: Muskrat City has been invaded by a pack of ferocious dinosaurs. Superstilton's friend Proton is trapped in the Mouseum of Natural History along with Sewer Rat Tony Sludge's daughter, Elena. The Heromice and the Sewer Rats have to work together to save their friends and the city.