Reviewed by HootRated editorial · Last updated
The last boy and girl in the world
Siobhan Vivian
The last boy and girl in the world
Age Rating, Reading Level & Content Guide
by Siobhan Vivian
The text is written at a 4th 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
The air is thick with the scent of rain and wet earth as the river swells, threatening to swallow Keeley’s whole town. Laughter bubbles up from her and her friends, a bright spark against the looming floodwaters. But underneath the fun, Keeley wonders if this could be the last time they’re all together.
Themes
Quick Assessment
This middle-grade novel follows Keeley, a high school senior trying to lighten the mood as her town faces evacuation from rising floodwaters. It explores themes of friendship, young love, and resilience in the face of natural disaster, making it suitable for readers aged 9 to 12. The story handles emotional challenges with sensitivity and contains no intense content.
Why we rated The last boy and girl in the world 9LE
The last boy and girl in the world is written at a Level 4-5 reading level with a Lexile measure of 760L across 419 pages. Strong independent readers around grade 5.5 can typically handle this book on their own; with parent or teacher support, The last boy and girl in the world works for readers up to grade 6.5.
We rate The last boy and girl in the world as 9LE ("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, The last boy and girl in the world explores friendship, love, floods, cities and towns, and fiction — 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 friendship, love, floods.
Maybe not for
- ! Reluctant readers who need a fast hook — the pacing here rewards patience.
For Parents
Content Intensity
9LE — Light — EmotionalLight conflict or tension. Mild peril resolved quickly.
Was our "Mild" content intensity rating accurate for this book?
Reading Insights
Hook Factor
1/10A steady, thoughtful read that rewards patient readers.
Discussion Potential
1/10A lighter read — great for independent enjoyment.
Book DNA
Multi-dimensional content fingerprint
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Details
Book Length
- ISBN
- 9781481452298
- Pages
- 419
- Publisher
- Simon and Schuster
- Published
- 2016
- Type
- Fiction
- Lexile
- 760L