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Mrs Frisby and the Rats of NIMH by Robert C. O'Brien

Mrs Frisby and the Rats of NIMH

Part of the Puffin Modern Classics Series
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A wonderful fable which makes readers reconsider any prejudices they may have about rats! Mrs Frisby needs to move home quickly when the farmer threatens to plough up the field where her home is. But everything goes wrong and she and her sick son Timothy only survive because of the kindness of the rats who have escaped from a research laboratory. Rats are heroes, the humans experimenting on them are villains, in this thrilling and thought provoking story.

Puffin Fact! Mrs Frisby and the Rats of NIMH was inspired by research carried out on the mice and rat population over twenty years from the 1940s to the 1960s! Download more Puffin Facts here!


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The Good Book Guide logo The Good Book Guide Review. The rats of NIMH learn more than the scientists bargain for. escape and embark on an adventurous mission of mercy to save the orphaned family of a brave fieldmouse colleague. As engrossing as it is unusual.


Mrs Frisby and the Rats of NIMH by Robert C. O'Brien

Time is running out for Mrs Frisby. She must move her family of mice before the farmer destroys their home. But her youngest son, Timothy, is too ill to survive the move. Help comes in the unexpected form of a group of mysterious, super-intelligent rats. But the rats are in danger too, and little by little Mrs Frisby discovers their extraordinary past...

To find out more about the inspiration for the story, a book quiz and a host of intersting rat facts download a Special Puffin Extra!

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About the Author

Robert C O'Brien was the pseudonym of Robert Leslie Conly. Born in New York City in 1922 he began to write freelance stories, poems and essays soon after leaving high school. He was married with four children and was an editor of the National Geographic Magazine in Washington DC until his death in 1973.

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Book Info

Publication date

3rd July 2014


Robert C. O'Brien

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Puffin Books an imprint of Penguin Books Ltd


304 pages


7+ readers
9+ readers

General fiction (Children's / Teenage)



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