Invisible Fault Lines
Kristen-Paige Madonia
Invisible Fault Lines
Age Rating, Reading Level & Content Guide
by Kristen-Paige Madonia
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
There’s a secret buried deep beneath the streets of San Francisco, one that only a few know about. When a girl’s father mysteriously disappears, time itself seems to twist and turn in ways no one can explain. But that’s only the beginning.
Quick Assessment
Invisible Fault Lines is a middle-grade novel blending mystery and speculative fiction, centered on a young girl's search for her missing father in San Francisco. The story incorporates themes of family bonds and time travel, suitable for readers ages 9-12. It handles complex concepts in an accessible way without intense or graphic content.
Why we rated Invisible Fault Lines 12LE
Invisible Fault Lines is written at a Level 7 reading level across 336 pages. Strong independent readers around grade 8.0 can typically handle this book on their own; with parent or teacher support, Invisible Fault Lines works for readers up to grade 9.0.
We rate Invisible Fault Lines as 12LE ("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, Invisible Fault Lines explores missing persons, fathers and daughters, time travel, adventure, 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.
- ✓ Patient readers who enjoy slower, character-driven stories.
- ✓ Kids drawn to stories about missing persons, fathers and daughters, time travel.
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
12LE — 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
- 9781481430722
- Pages
- 336
- Publisher
- Simon and Schuster
- Published
- 2017
- Type
- Fiction