Cogheart
Peter Bunzl
Cogheart
Age Rating, Reading Level & Content Guide
by Peter Bunzl
The text is written at a 7th 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
The steady tick-tock of clockwork fills the air, mixing with the faint scent of oil and warm metal. Lily’s fingers brush against the smooth, mechanical fur of Malkin, her clever mechanimal fox, as she races through shadowy streets. Something precious is missing—her father—and the secret of his incredible invention hangs in the balance.
Quick Assessment
Cogheart follows thirteen-year-old Lily Hartman as she embarks on a thrilling adventure to find her missing father and unravel the mystery behind his groundbreaking invention, a perpetual motion machine. Set in a richly imagined world blending technology and whimsy, this middle-grade novel is appropriate for ages 9-12 and includes themes of family, friendship, and courage. The story contains mild peril and suspense but remains suitable for its target audience.
Why we rated Cogheart 12LP
Cogheart is written at a Level 7 reading level across 368 pages. Strong independent readers around grade 8.0 can typically handle this book on their own; with parent or teacher support, Cogheart works for readers up to grade 9.0.
We rate Cogheart as 12LP ("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, Cogheart explores adventure, family, friendship, science & nature, 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, family, 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.
- ! Reluctant readers who need a fast hook — the pacing here rewards patience.
For Parents
Content Intensity
12LP — 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
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
- 9781631632877
- Pages
- 368
- Publisher
- Cogheart Trilogy
- Published
- Feb 12, 2019
- Type
- Fiction