Reviewed by HootRated editorial · Last updated
Horizon
Jenn Reese
Horizon
Age Rating, Reading Level & Content Guide
Above World #3
by Jenn Reese
The text is written at a 4th 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. Its HootRating code, ME, means moderate content, mostly emotional.
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About This Book
The salty spray of the sea stings Aluna’s face as she and her friends dive into the depths of the underwater city. The echo of clashing metal and whirring machines fills the water around them, a sign that danger is closer than ever. Together, they must face a terrifying enemy and decide if their friendship is strong enough to save their world.
Themes
Quick Assessment
Horizon is the thrilling conclusion to the Above World series, featuring a group of young friends from diverse backgrounds who embark on a daring mission to prevent a war. Suitable for ages 9 to 12, this middle-grade fantasy explores themes of friendship, loyalty, and courage against a backdrop of underwater cities and technological threats. Parents should note the presence of conflict and peril but find the story ultimately uplifting and adventurous.
Why we rated Horizon ME (Moderate)
Horizon is written at a Level 4-5 reading level across 390 pages. Reading-wise, most kids in grade 6 and up can manage Horizon on their own; younger readers can enjoy it with a parent or teacher reading along.
We rate Horizon as ME (Moderate, mostly 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, Horizon explores adventure, friendship, fantasy world-building, quest, and dystopia — 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, friendship, fantasy world-building.
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
ME · Moderate · EmotionalReading the HootRating code: the first letter is the content intensity (C = Gentle · L = Mild · M = Moderate · I = Intense · V = Very Intense); the second, when there is one, is the kind of content that drives it (E = Emotional · P = Physical · S = Social · T = Thematic). Reading level and age range are rated separately. How we rate
Real stakes and emotional weight. May include sustained danger, loss, or bullying.
Was our "Moderate" content intensity rating accurate for this book?
Reading Insights
Discussion Potential
2/10A lighter read — great for independent enjoyment.
Book DNA
Multi-dimensional content fingerprint
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Details
Book Length
- ISBN
- 9780763664176
- Pages
- 390
- Publisher
- National Geographic Books
- Published
- 2014
- Type
- Fiction