Mrs. Frisby and the Rats of NIMH is Newberry award winning book by Robert C. O'Brien. It is about the adventures of a field mouse, named Mrs. Frisby, her family (esp. her ill son Timothy), and a colony of escaped lab rats made intelligent by an experiment at the National Institute of Mental Health (NIMH).

It's also one of seoman's favorite books. Go to your local library and check it out.

A movie entitled The Secret of NIMH has been based on this book.