Book Series · 3 Books

Rats of NIMH Books

In order from Mrs. Frisby and the Rats of NIMH to R-T, Margaret, and the Rats of NIMH.

Where the story begins

First Book in the Series

Sale price

$858

Book #1 · Chapter Book · Ages 8–12 · 1971

Mrs. Frisby and the Rats of NIMH

By Robert C. O'Brien, Zena Bernstein (Illustrator)

A mouse seeks help from intelligent rats to save her sick son.

233 pages· 53,663 words· Est. 7.5 hour read

4.5/7 Bookroo experts

$8.99Save 5%

Summary: Mrs. Frisby, a widowed mouse, faces a dire dilemma: move her family or risk their lives. Her son Timothy is too ill to travel. Enter the rats of NIMH, a group of ingenious creatures with a plan that could save them all. As Mrs. Frisby navigates this unexpected alliance, she discovers secrets that could change everything. Can she trust these extraordinary rats, and what will she learn about courage and sacrifice along the way? Dive into a tale of survival, intelligence, and unexpected friendships.

In reading order

Rats of NIMH Series

3 books · Published 1971–1990

Sale price

$858

Mrs. Frisby and the Rats of NIMH

Chapter Book · Ages 8–12 · 1971

A mouse seeks help from intelligent rats to save her sick son.

Sale price

$958

Racso and the Rats of NIMH

Chapter Book · Ages 9–12 · 1986

A boastful rodent faces a crisis that tests his heroism.

Sale price

$958

R-T, Margaret, and the Rats of NIMH

Chapter Book · Ages 8–12 · 1990

Lost in the woods, two siblings must protect their secretive rescuers to find their way home.

Good to know

Common Questions

How many books are in the Rats of NIMH series?

There are 3 books in the Rats of NIMH series. It began with Mrs. Frisby and the Rats of NIMH in 1971, and the newest book, R-T, Margaret, and the Rats of NIMH, was published in 1990.