Infernal devices
Philip Reeve
Infernal devices
Age Rating, Reading Level & Content Guide
by Philip Reeve
The text is written at a 7th grade reading level, the subject matter is intended for middle graders (ages 9–12), and the content has moderate intensity with some emotionally heavy themes.
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About This Book
The sharp clang of metal echoes through the quiet streets, stirring the air with the scent of oil and adventure. Wren’s fingertips trace the cold, mysterious Tin Book, its secrets whispering promises of danger and excitement. But when shadows snatch her away, the calm of Anchorage shatters, and the cost of rescue weighs heavy on those who love her most.
Quick Assessment
Set nearly two decades after Anchorage's founding, this middle-grade science fiction novel follows Tom and Hester as they face the return of old enemies when their daughter Wren is kidnapped. The story explores themes of family loyalty, sacrifice, and adventure, suitable for readers aged 9 to 12. Parents should note some suspenseful and intense moments involving danger and emotional challenges.
Why we rated Infernal devices 12ME
Infernal devices is written at a Level 7 reading level across 358 pages. Strong independent readers around grade 8.0 can typically handle this book on their own; with parent or teacher support, Infernal devices works for readers up to grade 9.0.
We rate Infernal devices as 12ME ("Moderate — Emotional") because the content sits in the "Moderate" range — moderate conflict that may involve loss, scary scenes, or interpersonal stakes. The strongest signals come from emotional weight, physical peril — these are the dimensions parents should evaluate against their reader's tolerance.
No specific content flags were raised by community reviewers, which is consistent with the moderate intensity score.
Thematically, Infernal devices explores science & nature, family, adventure, 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 science & nature, family, adventure.
Maybe not for
- ! Readers who get easily upset by emotional or moderately dark scenes — the conflict here is real, not just background flavor.
- ! Reluctant readers who need a fast hook — the pacing here rewards patience.
For Parents
Content Intensity
12ME — Moderate — EmotionalReal stakes and emotional weight. May include sustained danger, loss, or bullying.
Was our "Moderate" content intensity rating accurate for this book?
Reading Insights
Hook Factor
2/10A 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
- 9780060826352
- Pages
- 358
- Publisher
- HarperTeen
- Published
- 2005
- Type
- Fiction