**Grade Level: 4-6; Reading Level: V** Hi, and welcome to Mrs. Frisby and the Rats of NIMH. This novel centers around a colony of escaped lab rats, the rats of NIMH. They live in a technologically sophisticated and literate society mimicking that of humans. They come to the aid of Mrs. Frisby, a field mouse who seeks to protect her children and home from destruction by a farmer's plow. Listen and follow along. Chapter 1 The Sickness of Timothy Frisby Send me a message for your free pdf copy of this book.