The 39 Clues
Peter Lerangis
The 39 Clues
Age Rating, Reading Level & Content Guide
The Sword Thief
by Peter Lerangis
The text is written at a 4th 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
Amy and Dan race through shadowy streets, clutching a mysterious clue that could change everything. Alistair lurks nearby, his true intentions hidden beneath a crafty smile. Suddenly, danger strikes — but who is the real threat?
Quick Assessment
This middle-grade adventure follows siblings Amy and Dan Cahill as they unravel secrets tied to their powerful family legacy. The story involves suspense, mild peril, and puzzles suitable for children ages 9 to 12. Parents should note the presence of chase scenes and moments of tension, but no graphic content.
Why we rated The 39 Clues 9LP
The 39 Clues is written at a Level 4-5 reading level across 156 pages. Strong independent readers around grade 5.5 can typically handle this book on their own; with parent or teacher support, The 39 Clues works for readers up to grade 6.5.
We rate The 39 Clues as 9LP ("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.
No specific content flags were raised by community reviewers, which is consistent with the mild intensity score.
Thematically, The 39 Clues explores adventure, mystery, and family — 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, family.
Maybe not for
- ! Readers looking for something heavier — this is a gentle, low-stakes story by design.
For Parents
Content Intensity
9LP — Light — PhysicalLight conflict or tension. Mild peril resolved quickly.
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
2/10A lighter read — great for independent enjoyment.
Book DNA
Multi-dimensional content fingerprint
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Details
Book Length
- ISBN
- 9780545341325
- Pages
- 156
- Publisher
- scholastic
- Published
- 2011
- Type
- Fiction