At the bottom of the world

Name: At the bottom of the world
Author: Bill Nye
ISBN: 9781419723032

Age Rating, Reading Level & Content Guide

At the Bottom of the World

by Bill Nye

Illustrated by Nicholas Iluzada

Reading Level 3-4 LE · Mild · Emotional Ages 9-12 Matched

The text is written at a 3rd grade reading level, the subject matter is intended for middle graders (ages 9–12), and the content is mild with minimal sensitive material. Its HootRating code, LE, means mild content, mostly emotional.

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About This Book

What if you found out your new foster siblings were geniuses who could build robots and solve math puzzles in their sleep? Imagine sneaking into a top scientist’s lab only to be whisked away on a wild trip to the bottom of the world—Antarctica! But when a scientist disappears and her secret research vanishes, can you help uncover the mystery before it’s too late?

Themes

OrphansBrothers and sistersAdventureScienceFriendship Mystery

Quick Assessment

Jack, Ava, and Matt, foster siblings who are orphans, get pulled into a science competition in Antarctica when a missing researcher and her vanished findings suggest a rival is cheating. The story blends real science explanations with humor and suspense, and its mild peril and missing-person plot stay light rather than graphic. Orphan backstory and sibling rivalry are handled briefly, making this a straightforward science-driven mystery for parents to consider.

Why we rated At the bottom of the world LE (Mild)

At the bottom of the world is written at a Level 3-4 reading level across 247 pages. Reading-wise, most kids in grade 5 and up can manage At the bottom of the world on their own; younger readers can enjoy it with a parent or teacher reading along.

We rate At the bottom of the world as LE (Mild, mostly 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, At the bottom of the world explores orphans, brothers and sisters, adventure, science, and friendship — 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 orphans, brothers and sisters, adventure.

Maybe not for

! Readers looking for something heavier — this is a gentle, low-stakes story by design.

For Parents

Content Intensity

LE · Mild · Emotional

Emotional

Mild ←

Physical

Mild

Social

Gentle

Thematic

Mild

Reading 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

Light conflict or tension. Mild peril resolved quickly.

Data confidence: high

Was our "Mild" content intensity rating accurate for this book?