What reading level is The case of the vanishing emerald?

The case of the vanishing emerald by Holly Webb is at a Level 4-5 reading level (Lexile 720L). Recommended for Middle Grades readers (Ages 9-12).

What age is The case of the vanishing emerald appropriate for?

The case of the vanishing emerald is recommended for Ages 9-12. HootRating: 9LE (Light — Emotional).

What genre is The case of the vanishing emerald?

The case of the vanishing emerald is fiction — Juvenile Fiction.

Does The case of the vanishing emerald have any content warnings?

The case of the vanishing emerald has a HootRating of 9LE (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 The case of the vanishing emerald?

The case of the vanishing emerald by Holly Webb is 168 pages.

Reviewed by HootRated editorial · Last updated May 18, 2026

The case of the vanishing emerald

Holly Webb

The case of the vanishing emerald

Age Rating, Reading Level & Content Guide

by Holly Webb

Illustrated by Lindsay, Marion, illustrator

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

Maisie races through the crowded theater backstage, heart pounding as the lights dim around her. The priceless emerald necklace has disappeared, and suspicion falls on everyone. Who could have taken it — and why?

Themes

Mystery HistoricalTheaterFriendship Adventure

Quick Assessment

Set in Victorian London, this middle-grade mystery follows young detective Maisie Hitchins as she unravels the theft of a valuable necklace linked to a theater actress. The story offers an engaging introduction to historical settings and detective work, suitable for readers aged 9 to 12. It contains mild suspense but no intense content, making it appropriate for this age group.

Why we rated The case of the vanishing emerald 9LE

The case of the vanishing emerald is written at a Level 4-5 reading level with a Lexile measure of 720L across 168 pages. Strong independent readers around grade 5.5 can typically handle this book on their own; with parent or teacher support, The case of the vanishing emerald works for readers up to grade 6.5.

We rate The case of the vanishing emerald 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, The case of the vanishing emerald explores mystery, historical, theater, friendship, and adventure — 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, historical, theater.