What reading level is The Mystery of the spy's diary (Next chapters)?

The Mystery of the spy's diary (Next chapters) by Charles Higgins is at a Level 3-4 reading level. Recommended for Middle Grades readers (Ages 9-12).

What age is The Mystery of the spy's diary (Next chapters) appropriate for?

The Mystery of the spy's diary (Next chapters) is recommended for Ages 9-12. HootRating: 8LP (Light — Physical). Content flags: Mild Peril.

What genre is The Mystery of the spy's diary (Next chapters)?

The Mystery of the spy's diary (Next chapters) is fiction — Education. Part of the River Cities Kids; Next Chapters series.

Does The Mystery of the spy's diary (Next chapters) have any content warnings?

The Mystery of the spy's diary (Next chapters) has a HootRating of 8LP (Light — Physical). Content flags include: Mild Peril. On HootRated, every book is rated across four dimensions — emotional, physical, social, and thematic — to help parents make informed choices.

How many pages is The Mystery of the spy's diary (Next chapters)?

The Mystery of the spy's diary (Next chapters) by Charles Higgins is 64 pages (approximately 5,828 words).

Reviewed by HootRated editorial · Last updated May 18, 2026

The Mystery of the spy's diary (Next chapters)

Charles Higgins

The Mystery of the spy's diary (Next chapters)

Age Rating, Reading Level & Content Guide

by Charles Higgins

River Cities Kids; Next Chapters

Reading Level 3-4 8LP Ages 9-12 Matched Page-Turner

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.

Buy on Amazon Listen on Audible

We may earn a commission from these links. Bookshop.org supports independent bookstores with every purchase.

About This Book

Karen Harper embarks on an exciting adventure to uncover a hidden treasure and unravel the secrets behind her ancestor's role as a spy in the American Revolution. Along the way, she deciphers clues from a mysterious diary that could change history forever.

Themes

HistoryMystery Adventure Coming of Age

Quick Assessment

This is a Level 3-4 book with mild content intensity. Content themes include mild peril. Written for readers ages 9-12.

Why we rated The Mystery of the spy's diary (Next chapters) 8LP

The Mystery of the spy's diary (Next chapters) is written at a Level 3-4 reading level across 64 pages (approximately 5,828 words). Strong independent readers around grade 4.6 can typically handle this book on their own; with parent or teacher support, The Mystery of the spy's diary (Next chapters) works for readers up to grade 5.6.

Read aloud, The Mystery of the spy's diary (Next chapters) takes about 39 minutes, which fits within a single read-aloud session.

We rate The Mystery of the spy's diary (Next chapters) as 8LP ("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.

Thematically, The Mystery of the spy's diary (Next chapters) explores history, mystery, adventure, and coming of age — 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.
✓ Reluctant readers who need fast-paced, hook-heavy stories to stay engaged.
✓ Kids drawn to stories about history, mystery, adventure.