The case of the locked box

Name: The case of the locked box
Author: Lewis B. Montgomery
ISBN: 9781575656267

Age Rating, Reading Level & Content Guide

by Lewis B. Montgomery

Illustrated by Amy Wummer

Milo & Jazz Mysteries

Reading Level 3-4 LE · Mild · Emotional Ages 5-8 Matched Page-Turner

The text is written at a 3rd grade reading level, the subject matter is intended for younger children (ages 5–8), 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

Join Milo and Jazz, two young detectives-in-training, as they use smart STEM skills to solve the mystery of the missing money from a locked box. When Jazz faces a student court trial, Milo works hard to uncover the truth and clear her name. Filled with fun puzzles, hidden pictures, and brain teasers, this story is perfect for budding sleuths ready for chapter books.

Themes

Detective and mystery storiesSchool storiesFriendship

Quick Assessment

This is a Level 3-4 book with mild content intensity. No notable content concerns flagged. Written for readers ages 5-8.

Why we rated The case of the locked box LE (Mild)

The case of the locked box is written at a Level 3-4 reading level across 106 pages (approximately 6,839 words). Reading-wise, most kids in grade 5 and up can manage The case of the locked box on their own; younger readers can enjoy it with a parent or teacher reading along.

Read aloud, The case of the locked box takes about 46 minutes, which fits within a single read-aloud session.

We rate The case of the locked box 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, The case of the locked box explores detective and mystery stories, school stories, and friendship — these threads give the book room to mean different things to different readers.

Good fit for

✓ Children in the Ages 5-8 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 detective and mystery stories, school stories, friendship.
✓ Readers who fall hard for one book and want a long series to live in — there are 8 more books in the Milo & Jazz Mysteries series.

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

Gentle

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: standard

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