The case of the secret tunnel
Holly Webb
The case of the secret tunnel
Age Rating, Reading Level & Content Guide
by Holly Webb
Illustrated by Lindsay, Marion, illustrator
The text is written at a 5th grade reading level, the subject matter is intended for middle graders (ages 9–12), and the content is mild with minimal sensitive material.
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About This Book
There’s a new lodger at Gran’s boarding house, but no one knows who they really are. Maisie’s about to discover secrets darker and more dangerous than she ever expected—but that’s only the beginning.
Themes
Quick Assessment
This middle-grade mystery follows Maisie Hitchins as she investigates the mysterious identity of a new lodger at her grandmother's boarding house. Set in historical Europe, the story explores themes of friendship and social issues suitable for readers aged 9 to 12. The book contains mild suspense and some moments of danger but remains appropriate for its target audience.
Why we rated The case of the secret tunnel 10LE
The case of the secret tunnel is written at a Level 5-6 reading level with a Lexile measure of 800L across 161 pages. Strong independent readers around grade 6.5 can typically handle this book on their own; with parent or teacher support, The case of the secret tunnel works for readers up to grade 7.5.
We rate The case of the secret tunnel as 10LE ("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, The case of the secret tunnel explores mystery, friendship, historical, social issues, and boardinghouses — 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 mystery, friendship, historical.
Maybe not for
- ! Reluctant readers who need a fast hook — the pacing here rewards patience.
For Parents
Content Intensity
10LE — 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
2/10A lighter read — great for independent enjoyment.
Book DNA
Multi-dimensional content fingerprint
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Details
Book Length
- ISBN
- 9780544815544
- Pages
- 161
- Publisher
- Clarion Books
- Published
- 2014
- Type
- Fiction
- Lexile
- 800L