RT, Margaret, and the rats of NIMH
Jane Leslie Conly
RT, Margaret, and the rats of NIMH
Age Rating, Reading Level & Content Guide
by Jane Leslie Conly
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
Did you know that deep in Thorn Valley, a secret community of super-smart rats lives hidden from humans? Racso and his friends have to keep their world safe after two kids stumble upon their secret—but that's only the beginning.
Quick Assessment
This middle-grade novel continues the story of Racso and his friends, intelligent rats living in a hidden valley. It explores themes of friendship, survival, and secrecy in a way that is appropriate for ages 9-12. Parents should know that while the story includes mild peril related to the rats' efforts to protect their community, it remains suitable for this age group.
Why we rated RT, Margaret, and the rats of NIMH 11LE
RT, Margaret, and the rats of NIMH is written at a Level 6 reading level across 260 pages. Strong independent readers around grade 7.0 can typically handle this book on their own; with parent or teacher support, RT, Margaret, and the rats of NIMH works for readers up to grade 8.0.
We rate RT, Margaret, and the rats of NIMH as 11LE ("Light — Emotional") 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.
No specific content flags were raised by community reviewers, which is consistent with the mild intensity score.
Thematically, RT, Margaret, and the rats of NIMH explores adventure, friendship, and fantasy world-building — 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, friendship, fantasy world-building.
Maybe not for
- ! Reluctant readers who need a fast hook — the pacing here rewards patience.
For Parents
Content Intensity
11LE — Light — EmotionalLight conflict or tension. Mild peril resolved quickly.
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
1/10A lighter read — great for independent enjoyment.
Book DNA
Multi-dimensional content fingerprint
Similar Books
Based on content and theme analysis
R-T, Margaret, and the rats of Nimh
Jane Leslie Conly
R-T, Margaret, and the rats of Nimh
Jane Leslie Conly
Rats
Anna Claybourne
Rats
Anna Claybourne
Rats (You and Your Pet)
Jean Coprendale
Rats (You and Your Pet)
Jean Coprendale
Rats (Read & Learn)
Patricia Whitehouse
Rats (Read & Learn)
Patricia Whitehouse
Oh, rats!
Albert Marrin
Oh, rats!
Albert Marrin
Rats
Gerald Legg
Rats
Gerald Legg
Details
Book Length
- ISBN
- 0060213639
- Pages
- 260
- Publisher
- Harpercollins Childrens Books
- Published
- 1990
- Type
- Fiction