What reading level is Brother in a box?

Brother in a box by Evan Kuhlman is at a Level 5-6 reading level (Lexile 820L). Recommended for Middle Grades readers (Ages 9-12).

What age is Brother in a box appropriate for?

Brother in a box is recommended for Ages 9-12. HootRating: 10LE (Light — Emotional).

What genre is Brother in a box?

Brother in a box is fiction — Juvenile Fiction.

Does Brother in a box have any content warnings?

Brother in a box has a HootRating of 10LE (Light — Emotional). No specific content flags noted. On HootRated, every book is rated across four dimensions — emotional, physical, social, and thematic — to help parents make informed choices.

How many pages is Brother in a box?

Brother in a box by Evan Kuhlman is 288 pages.

Reviewed by HootRated editorial · Last updated June 9, 2026

Brother in a box

Evan Kuhlman

Brother in a box

Age Rating, Reading Level & Content Guide

by Evan Kuhlman

Reading Level 5-6 10LE Ages 9-12 Balanced Read

The text is written at a 5th 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

What if your new big brother wasn’t human—but a super cool robot from France? Imagine putting together a brother who’s perfect at everything but also loves to show off and even flirts with girls! When strange people start sneaking around, it’s up to Matt to protect his robot brother—and uncover a secret that could change everything.

Themes

Family AdventureRobotsFriendshipSchools

Quick Assessment

Brother in a Box is a middle-grade adventure about Matt, whose new brother is a robot created by his genius father. This story combines humor, family dynamics, and suspense as Matt navigates the challenges of having a robotic sibling while facing threats from those who want to steal him. Suitable for ages 9-12, the book includes themes of brotherhood, friendship, and technology, with mild peril and action sequences.

Why we rated Brother in a box 10LE

Brother in a box is written at a Level 5-6 reading level with a Lexile measure of 820L across 288 pages. Strong independent readers around grade 6.5 can typically handle this book on their own; with parent or teacher support, Brother in a box works for readers up to grade 7.5.

We rate Brother in a box as 10LE ("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, Brother in a box explores family, adventure, robots, friendship, and schools — 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 family, adventure, robots.