In Heromice: Mice to the Rescue!, Geronimo Stilton helps watch over Muskrat City. He is determined to fight against all evil.Terrible Tony Sludge has escaped from prison! Geronimo Super stilton and the Heromice are the only ones who can save Muskrat City from the ill-famed Sewer Rats. They have to stop a massive blackout! Will our superheroes fight bravely and defeat their foes without risking their fur? Discover the answer in this delightfully illustrated book.