Age Level: 7 - 12
Lexile Measure: 650L
Muskrat City is under attack again. The Sewer Rats have created a weather-changing device, creating huge storms that they hope will flood the entire city! The rodents of Muskrat City have one hope: the Heromice. Can Geronimo Superstilton, Swiftpaws, and Lady Wonderwhiskers save the city?