What reading level is Spy School Project X?

Spy School Project X by Stuart Gibbs is at a Level 5-6 reading level. Recommended for Middle Grades readers (Ages 9-12).

What age is Spy School Project X appropriate for?

Spy School Project X is recommended for Ages 9-12. HootRating: 10LP (Light — Physical). Content flags: Mild Peril, Fantasy Violence.

What genre is Spy School Project X?

Spy School Project X is fiction — Juvenile Fiction. Part of the Spy School series.

Does Spy School Project X have any content warnings?

Spy School Project X has a HootRating of 10LP (Light — Physical). Content flags include: Mild Peril, Fantasy Violence. On HootRated, every book is rated across four dimensions — emotional, physical, social, and thematic — to help parents make informed choices.

How many pages is Spy School Project X?

Spy School Project X by Stuart Gibbs is 384 pages.

Reviewed by HootRated editorial · Last updated May 18, 2026

Spy School Project X

Stuart Gibbs

Spy School Project X

Age Rating, Reading Level & Content Guide

by Stuart Gibbs

Spy School · Book 10

Reading Level 5-6 10LP 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

Ben Ripley, a clever young spy, embarks on an exciting chase across cities and states using cars, trains, boats, and planes. With his quick thinking and bravery, he tries to find Murray Hill before his cyber foes do. Adventure and suspense fill every page as Ben races against the clock!

Themes

Adventure Friendship Mystery

Quick Assessment

This is a Level 5-6 book with mild content intensity. Content themes include mild peril, fantasy violence. Written for readers ages 9-12.

Why we rated Spy School Project X 10LP

Spy School Project X is written at a Level 5-6 reading level across 384 pages. Strong independent readers around grade 6.5 can typically handle this book on their own; with parent or teacher support, Spy School Project X works for readers up to grade 7.5.

We rate Spy School Project X as 10LP ("Light — Physical") 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.

Specific content flags noted by reviewers: Mild Peril, Fantasy Violence.

Thematically, Spy School Project X explores adventure, friendship, and mystery — 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.
✓ Readers who like a steady plot with enough momentum to keep pages turning.
✓ Kids drawn to stories about adventure, friendship, mystery.
✓ Readers who fall hard for one book and want a long series to live in — there are 9 more books in the Spy School series.