Skipping stones at the center of the earth
Andy Hueller
Skipping stones at the center of the earth
Age Rating, Reading Level & Content Guide
a middle grade novel
by Andy Hueller
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
Cal Cobble is not just any twelve-year-old—he lives on a secret island at the very center of the earth where danger hides in every shadow. When a mysterious stranger called Mr. E appears, Cal’s world flips upside down, forcing him to face bullies, secrets, and his biggest fear: the nearby prison. What will happen when Cal stops running and starts standing up for himself?
Themes
Quick Assessment
This middle-grade novel follows twelve-year-old Cal Cobble, who lives in an orphanage on a remote island near a prison. The story explores themes of bullying, family bonds, and personal courage as Cal encounters a mysterious figure who challenges him to confront his fears. Suitable for ages 9-12, the book addresses complex emotional topics in an accessible way without graphic content.
Why we rated Skipping stones at the center of the earth 11ME
Skipping stones at the center of the earth is written at a Level 6 reading level across 241 pages. Strong independent readers around grade 7.0 can typically handle this book on their own; with parent or teacher support, Skipping stones at the center of the earth works for readers up to grade 8.0.
We rate Skipping stones at the center of the earth 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 — 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, Skipping stones at the center of the earth explores bullying, family, adventure, and coming of age — 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.
- ✓ Readers ready to talk through themes after they finish — there's enough substance for a meaningful conversation.
- ✓ Kids drawn to stories about bullying, 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
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
2/10A steady, thoughtful read that rewards patient readers.
Discussion Potential
4/10Good conversation starter with themes worth exploring together.
Book DNA
Multi-dimensional content fingerprint
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Details
Book Length
- ISBN
- 9781599554884
- Pages
- 241
- Publisher
- Cedar Fort
- Published
- 2010
- Type
- Fiction