Reviewed by HootRated editorial · Last updated
Mrs. Frisby and the Rats of Nimh/Newbery Summer
Robert C. O'Brien
Mrs. Frisby and the Rats of Nimh/Newbery Summer
Age Rating, Reading Level & Content Guide
by Robert C. O'Brien
The text is written at a 6th grade reading level, the subject matter is intended for middle graders (ages 9–12), and the content is mild with minimal sensitive material.
We may earn a commission from these links. Bookshop.org supports independent bookstores with every purchase.
About This Book
Mrs. Frisby isn’t just any mouse—she’s brave enough to face a ticking clock and a mysterious underground world of super-smart rats. These rats aren’t ordinary—they’ve escaped science experiments and hold secrets that could save her family. What happens when courage meets cleverness in a race against time?
Themes
Quick Assessment
This Newbery Medal-winning novel follows Mrs. Frisby, a widowed mouse who must protect her family by seeking help from highly intelligent rats living beneath a rosebush. The story explores themes of bravery, problem-solving, and cooperation, well-suited for readers ages 9-12. It contains mild peril but no graphic content, making it an excellent choice for middle-grade readers interested in classic adventure and animal characters.
Why we rated Mrs. Frisby and the Rats of Nimh/Newbery Summer 11LP
Mrs. Frisby and the Rats of Nimh/Newbery Summer is written at a Level 6 reading level across 240 pages. Strong independent readers around grade 7.0 can typically handle this book on their own; with parent or teacher support, Mrs. Frisby and the Rats of Nimh/Newbery Summer works for readers up to grade 8.0.
We rate Mrs. Frisby and the Rats of Nimh/Newbery Summer as 11LP ("Light — Physical") because the content sits in the "Mild" range — mild conflict — the kind a child encounters in normal play and sibling life. Across our four dimensions (emotional, physical, social, thematic) the book reads as evenly mild; no single dimension stands out as a concern.
Specific content flags noted by reviewers: Mild Peril.
Thematically, Mrs. Frisby and the Rats of Nimh/Newbery Summer explores adventure, family, friendship, animal characters, and classics — these threads give the book room to mean different things to different readers.
Good fit for
- ✓ Children in the Ages 9-12 range — the maturity and attention span match the story's pacing.
- ✓ Patient readers who enjoy slower, character-driven stories.
- ✓ Kids drawn to stories about adventure, family, friendship.
Maybe not for
- ! Reluctant readers who need a fast hook — the pacing here rewards patience.
For Parents
Content Intensity
11LP — Light — PhysicalLight conflict or tension. Mild peril resolved quickly.
Content Flags
Was our "Mild" content intensity rating accurate for this book?
Reading Insights
Hook Factor
2/10A steady, thoughtful read that rewards patient readers.
Discussion Potential
2/10A lighter read — great for independent enjoyment.
Book DNA
Multi-dimensional content fingerprint
Similar Books
Based on content and theme analysis
That pesky rat
Lauren Child
That pesky rat
Lauren Child
R-T, Margaret, and the rats of Nimh
Jane Leslie Conly
R-T, Margaret, and the rats of Nimh
Jane Leslie Conly
RT, Margaret, and the rats of NIMH
Jane Leslie Conly
RT, Margaret, and the rats of NIMH
Jane Leslie Conly
Rats
Anna Claybourne
Rats
Anna Claybourne
Rats!
Pat Hutchins
Rats!
Pat Hutchins
Mice to the Rescue!
Elisabetta Dami
Mice to the Rescue!
Elisabetta Dami
Details
Book Length
- ISBN
- 9780689862205
- Pages
- 240
- Publisher
- Aladdin Paperbacks
- Published
- May 1, 2003
- Type
- Fiction