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Secret of the Forbidden City

James Patterson, Chris Grabenstein

Cover of Secret of the Forbidden City

Secret of the Forbidden City

Age Rating, Reading Level & Content Guide

by James Patterson, Chris Grabenstein

Illustrated by Neufeld, Juliana, 1982- illustrator

Treasure Hunters (Little, Brown)

Reading Level 4-5 9LP Ages 9-12 Balanced Read Page-Turner

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

Bick and Beck Kidd embark on a thrilling quest across China and Berlin to save their mother from dangerous pirates. Their mission to recover a priceless artifact quickly turns into a race to find stolen Nazi treasure, testing their bravery and cleverness at every turn. Together, the siblings must outsmart villains and face daring challenges to bring their family back together.

Themes

AdventureFamilyBrothers and SistersBuried TreasureMissing PersonsTwins

Quick Assessment

This is a Level 4-5 book with mild content intensity. Content themes include mild peril, physical danger. Written for readers ages 9-12.

Why we rated Secret of the Forbidden City 9LP

Secret of the Forbidden City is written at a Level 4-5 reading level with a Lexile measure of 690L across 419 pages (approximately 37,582 words). Strong independent readers around grade 5.6 can typically handle this book on their own; with parent or teacher support, Secret of the Forbidden City works for readers up to grade 6.6.

Read aloud, Secret of the Forbidden City runs about 4.2 hours — long enough to span several bedtime sessions.

We rate Secret of the Forbidden City as 9LP ("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, Physical Danger.

Thematically, Secret of the Forbidden City explores adventure, family, brothers and sisters, buried treasure, and missing persons — 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 adventure, family, brothers and sisters.
  • Readers who fall hard for one book and want a long series to live in — there are 7 more books in the Treasure Hunters (Little, Brown) series.

Maybe not for

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

For Parents

Content Intensity

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

Light conflict or tension. Mild peril resolved quickly.

Content Flags

Mild Peril Physical Danger
Data confidence: high

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

Reading Insights

Hook Factor

7/10

High engagement — fast-paced, fun, and hard to put down. Great for reluctant readers.

Discussion Potential

2/10

A lighter read — great for independent enjoyment.

Book DNA

Multi-dimensional content fingerprint

Vocabulary Level
4
Emotional Weight
4
Narrative Pace
7
Theme Richness
8
World Scope
5
Data Confidence
8

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Details

Book Length

419 pages
37,582 words
4h 11m read-aloud
ISBN
9780316284806
Pages
419
Publisher
Little, Brown
Published
2015-09
Type
Fiction
Word Count
37,582
Lexile
690L
Read-Aloud
~4h 11m
Text Density
Light Text

Genres

Subjects

TwinsBrothers and SistersBuried TreasureAdventure and AdventurersMissing PersonsChinaGermanyAdventure StoriesTreasure TrovesAction & AdventureSurvival StoriesFamilySiblingsHumorous StoriesMysteries & Detective Stories

Places

ChinaGermany