Mrs. Frisby and the Rats of NIMH
 Mrs. Frisby and the Rats of NIMH is a 1971 children's book by Robert C. O'Brien with illustrations by Zena Bernstein. The winner of the 1972 Newbery Medal the story was adapted for film in 1982 as The Secret of NIMH.The novel relates the plight of a widowed field mouse Mrs.