The glass knife
John Tully
The glass knife
Age Rating, Reading Level & Content Guide
by John Tully
The text is written at a 6th 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
What if you were chosen for a mysterious ceremony where you might die and come back to life? Tio-Cada is about to face the Day of the Spider, a moment when his heart will be taken in a powerful ritual. But when a secret warning makes him question everything, will he uncover the truth behind the Miracle of Re-Birth?
Themes
Quick Assessment
Set in pre-Columbian South America, this middle-grade novel follows Tio-Cada, a boy preparing for a sacred ceremony that involves sacrifice and resurrection. The story explores themes of bravery, curiosity, and cultural traditions, suitable for readers aged 9 to 12. Parents should note the book involves ritual sacrifice and may prompt discussions about ancient customs and belief systems.
Why we rated The glass knife 11ME
The glass knife is written at a Level 6 reading level across 207 pages. Strong independent readers around grade 7.0 can typically handle this book on their own; with parent or teacher support, The glass knife works for readers up to grade 8.0.
We rate The glass knife as 11ME ("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, The glass knife explores adventure, coming of age, cultural traditions, 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, coming of age, cultural traditions.
Maybe not for
- ! Readers who get easily upset by emotional or moderately dark scenes — the conflict here is real, not just background flavor.
For Parents
Content Intensity
11ME — 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
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
- 0600340228
- Pages
- 207
- Publisher
- Arrow
- Published
- 1976
- Type
- Fiction