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In Self-Defense

Franklin W. Dixon

Cover of In Self-Defense

In Self-Defense

Age Rating, Reading Level & Content Guide

The Hardy Boys Casefiles #45

by Franklin W. Dixon

Reading Level 4-5 9LE Ages 9-12 Balanced Read

The text is written at a 4th 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

Here's a secret: Bayport’s newest martial arts school has a mystery shadowing it. Someone doesn’t want it to succeed, and strange things start happening that no one can explain—but that’s only the beginning.

Quick Assessment

This middle-grade mystery centers on a martial arts school in Bayport facing unexplained sabotage. Suitable for readers ages 9-12, it offers an engaging introduction to detective work without intense violence or mature themes. The story encourages problem-solving and perseverance in the face of challenges.

Why we rated In Self-Defense 9LE

In Self-Defense is written at a Level 4-5 reading level across 155 pages. Strong independent readers around grade 5.5 can typically handle this book on their own; with parent or teacher support, In Self-Defense works for readers up to grade 6.5.

We rate In Self-Defense as 9LE ("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, In Self-Defense explores mystery, adventure, friendship, 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.
  • Kids drawn to stories about mystery, adventure, friendship.

Maybe not for

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

For Parents

Content Intensity

9LE — Light — Emotional
Emotional
Light
Physical
Light
Social
Clear
Thematic
Light

Light conflict or tension. Mild peril resolved quickly.

Data confidence: standard

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

Reading Insights

Hook Factor

3/10

A steady, thoughtful read that rewards patient readers.

Discussion Potential

2/10

A lighter read — great for independent enjoyment.

Book DNA

Multi-dimensional content fingerprint

Vocabulary Level
4
Emotional Weight
4
Theme Richness
4
World Scope
1
Data Confidence
7

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Details

Book Length

155 pages
ISBN
9780671700423
Pages
155
Publisher
Simon Pulse
Published
1990
Type
Fiction

Genres

Subjects

Mysteries & Detective StoriesDetective and Mystery StoriesMystery and Detective StoriesHardy Boys