Belly Up
Stuart Gibbs
Belly Up
Age Rating, Reading Level & Content Guide
by Stuart Gibbs
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
Teddy stares wide-eyed as Henry the hippo suddenly floats belly up in his tank. The zoo says it’s just natural, but Teddy knows something fishy is going on. Just as he and Summer start snooping, a shadow moves in the dark—what could be lurking nearby?
Themes
Quick Assessment
This middle-grade mystery follows twelve-year-old Teddy as he investigates the suspicious death of a hippo at a zoo. The story includes themes of animal welfare and friendship, with some mild peril and moments of tension. Parents should note the presence of animal death, mild animal abuse, snakes, and some insensitive jokes related to weight.
Why we rated Belly Up 12MP
Belly Up is written at a Level 7 reading level across 304 pages. Strong independent readers around grade 8.0 can typically handle this book on their own; with parent or teacher support, Belly Up works for readers up to grade 9.0.
We rate Belly Up as 12MP ("Moderate — Physical") because the content sits in the "Moderate" range — moderate conflict that may involve loss, scary scenes, or interpersonal stakes. The strongest signals come from physical peril — these are the dimensions parents should evaluate against their reader's tolerance.
Specific content flags noted by reviewers: Animal Death, Animal Abuse, Mild Peril, Snakes, Insensitive Humor.
Thematically, Belly Up explores mystery, friendship, zoo animals, animal welfare, and adventure — 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 mystery, friendship, zoo animals.
Maybe not for
- ! Readers who get easily upset by emotional or moderately dark scenes — the conflict here is real, not just background flavor.
- ! Children currently coping with grief — the themes may hit close to home.
For Parents
Content Intensity
12MP — Moderate — PhysicalReal stakes and emotional weight. May include sustained danger, loss, or bullying.
Content Flags
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
2/10A lighter read — great for independent enjoyment.
Book DNA
Multi-dimensional content fingerprint
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Details
Book Length
- ISBN
- 9781442406391
- Pages
- 304
- Publisher
- Simon and Schuster
- Published
- 2010
- Type
- Fiction