Mrs. Frisby and the rats of Nimh / [electronic resource] Robert C. O'Brien ; illustrated by Zena Bernstein.

Sickness of Timothy Frisby -- Mr. Ages -- Crow and the cat -- Mr. Fitzgibbon's plow -- Five days -- Favor from Jeremy -- Owl -- "Go to the rats" -- In the rosebush -- Brutus -- In the library -- Isabella -- Powder for dragon -- Marketplace -- In the cage -- Maze -- Lesson in reading -- Air ducts -- Boniface estate -- Main hall -- Toy tinker -- Thorn Valley -- Captured -- Seven dead rats -- Escape -- At the meeting -- Doctor -- Epilogue.

Having no one to help her with her problems, a widowed mouse visits the rats whose former imprisonment in a laboratory made them wise and long lived. 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.