The 39 Clues
Riley Clifford
The 39 Clues
Age Rating, Reading Level & Content Guide
Rapid Fire
by Riley Clifford
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.
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About This Book
Flames lick the night sky as Washington burns—can you escape the chaos with a young Cahill? Magic sparkles as Houdini reveals a secret trick that might save his life, but what if it’s not enough? Deep beneath the ocean, a daring mission on the world’s first nuclear submarine puts everything on the line. What hidden dangers lie ahead?
Quick Assessment
This middle-grade adventure book features three thrilling stories centered around the powerful Cahill family, intertwined with significant historical events. Suitable for ages 9-12, the stories include mild peril and suspense but no graphic content. The book encourages curiosity about history through action-packed fictional tales.
Why we rated The 39 Clues 11LP
The 39 Clues is written at a Level 6 reading level across 257 pages. Strong independent readers around grade 7.0 can typically handle this book on their own; with parent or teacher support, The 39 Clues works for readers up to grade 8.0.
We rate The 39 Clues 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, The 39 Clues explores adventure, historical, family, and mystery — 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, historical, family.
Maybe not for
- ! Readers looking for something heavier — this is a gentle, low-stakes story by design.
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
3/10A steady, thoughtful read that rewards patient readers.
Discussion Potential
3/10A lighter read — great for independent enjoyment.
Book DNA
Multi-dimensional content fingerprint
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Details
Book Length
- ISBN
- 9780545522878
- Pages
- 257
- Publisher
- Scholastic Inc.
- Published
- 2011-01-10
- Type
- Fiction