Some extraordinary rats come to the aid of a mouse family in this Newbery Medal Award–winning classic by notable children’s author Robert C. O’Brien. Mrs. Frisby, a widowed mouse with four small children, is faced with a terrible problem. She must move her family to their summer quarters immediately, or face almost certain death. But her youngest son, Timothy, lies ill with pneumonia and must not be moved. Fortunately, she encounters the rats of NIMH, an extraordinary breed of highly intelligent creatures, who come up with a brilliant solution to her dilemma. And Mrs. Frisby in turn renders them a great service.
The Secret of NIMH Series
This series explores the extraordinary intelligence and complex social lives of a group of laboratory rats who escape their confines. Delve into their struggle for survival and their quest for a new home in a dangerous human world. The narratives celebrate ingenuity, courage, and the power of community in the face of adversity. It's a captivating adventure that appeals to readers of all ages.


Recommended Reading Order
- 1
- 2
Timothy Frisby, a field mouse, teams up with the adventurous young rat Racso as together they try to prevent the destruction of a secret community of rats that can read and write.