The mystery on Cobbett's Island
Kathryn Kenny
The mystery on Cobbett's Island
Age Rating, Reading Level & Content Guide
by Kathryn Kenny
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 gentle with no concerning themes.
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About This Book
Here's a secret: hidden inside an old book lies a mysterious letter that no one has noticed—until now. Trixie and her friends are about to uncover clues that lead to buried treasure on Cobbett's Island, but that's only the beginning.
Themes
Quick Assessment
This middle-grade mystery follows Trixie Belden and her friends as they spend ten days on Cobbett's Island and stumble upon a hidden letter that sparks a thrilling treasure hunt. The story is suitable for ages 9-12 and offers themes of friendship, adventure, and problem-solving without any intense content. It's a light, engaging read that encourages curiosity and teamwork.
Why we rated The mystery on Cobbett's Island 11C
The mystery on Cobbett's Island is written at a Level 6 reading level across 265 pages. Strong independent readers around grade 7.0 can typically handle this book on their own; with parent or teacher support, The mystery on Cobbett's Island works for readers up to grade 8.0.
We rate The mystery on Cobbett's Island as 11C ("Clear") because the content sits in the "Gentle" range — no conflict beyond everyday childhood experiences. Across our four dimensions (emotional, physical, social, thematic) the book reads as evenly gentle; no single dimension stands out as a concern.
No specific content flags were raised by community reviewers, which is consistent with the gentle intensity score.
Thematically, The mystery on Cobbett's Island explores adventure, mystery, friendship, juvenile fiction, and sailing — 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.
- ✓ Kids drawn to stories about adventure, mystery, friendship.
Maybe not for
- ! Readers whose emotional readiness lags behind their decoding skills — this book's intensity outruns its reading level, a classic "gifted kid" mismatch.
For Parents
Content Intensity
11C — ClearNo conflict beyond everyday childhood experiences. Safe for sensitive readers.
Was our "Gentle" content intensity rating accurate for this book?
Reading Insights
Hook Factor
3/10A steady, thoughtful read that rewards patient readers.
Discussion Potential
1/10A lighter read — great for independent enjoyment.
Book DNA
Multi-dimensional content fingerprint
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Details
Book Length
- ISBN
- 9780375830532
- Pages
- 265
- Publisher
- Random House Books for Young Readers
- Published
- 2005
- Type
- Fiction