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Cathy's Key

Sean Stewart

Cover of Cathy's Key

Cathy's Key

Age Rating, Reading Level & Content Guide

by Sean Stewart

NO OFFICIAL SERIES TITLE

Reading Level 5-6 10ME Ages 13+ Matched

The text is written at a 5th grade reading level, the subject matter is intended for teens (ages 13+), and the content has moderate intensity with some emotionally heavy themes.

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About This Book

When Cathy discovers her phone and diary are missing, she teams up with her best friend and her mysterious immortal boyfriend to track them down. Their search uncovers secrets about her father, who was thought to be lost forever, changing everything Cathy thought she knew. Adventure and mystery blend as she unravels her family's hidden past.

Quick Assessment

This is a Level 5-6 book with moderate content intensity. Content themes include emotional: loss & grief, emotional: identity & self-discovery, physical/safety: mild peril. Written for readers ages 13+.

Why we rated Cathy's Key 10ME

Cathy's Key is written at a Level 5-6 reading level across 144 pages (approximately 54,282 words). Strong independent readers around grade 6.1 can typically handle this book on their own; with parent or teacher support, Cathy's Key works for readers up to grade 7.1.

Read aloud, Cathy's Key runs about 6 hours — long enough to span several bedtime sessions.

We rate Cathy's Key as 10ME ("Moderate — Emotional") because the content sits in the "Moderate" range — moderate conflict that may involve loss, scary scenes, or interpersonal stakes. The strongest signals come from emotional weight, physical peril — these are the dimensions parents should evaluate against their reader's tolerance.

Specific content flags noted by reviewers: Emotional: Loss & Grief, Emotional: Identity & Self-Discovery, Physical/Safety: Mild Peril, Social: Family Change.

Thematically, Cathy's Key explores friendship, family, fantasy world-building, mystery, and coming of age — these threads give the book room to mean different things to different readers.

Good fit for

  • Children in the Ages 13+ range — the maturity and attention span match the story's pacing.
  • Readers who like a steady plot with enough momentum to keep pages turning.
  • Readers ready to talk through themes after they finish — there's enough substance for a meaningful conversation.
  • Kids drawn to stories about friendship, family, fantasy world-building.
  • Readers who fall hard for one book and want a long series to live in — there are 41 more books in the NO OFFICIAL SERIES TITLE series.

Maybe not for

  • ! Readers who get easily upset by emotional or moderately dark scenes — the conflict here is real, not just background flavor.
  • ! Children currently coping with grief — the themes may hit close to home.

For Parents

Content Intensity

10ME — Moderate — Emotional
Emotional
Moderate
Physical
Moderate
Social
Clear
Thematic
Clear

Real stakes and emotional weight. May include sustained danger, loss, or bullying.

Content Flags

Emotional: Loss & Grief Emotional: Identity & Self-Discovery Physical/Safety: Mild Peril Social: Family Change
Data confidence: standard

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

Reading Insights

Hook Factor

5/10

Engaging read with solid pacing and interesting themes.

Discussion Potential

4/10

Good conversation starter with themes worth exploring together.

Book DNA

Multi-dimensional content fingerprint

Vocabulary Level
4
Emotional Weight
6
Narrative Pace
1
Theme Richness
9
World Scope
5
Data Confidence
6

More in the NO OFFICIAL SERIES TITLE Series

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Details

Book Length

144 pages
54,282 words
6h 2m read-aloud
ISBN
9780762430857
Pages
144
Publisher
Running Press Kids
Published
May 5, 2008
Type
Fiction
Word Count
54,282
Read-Aloud
~6h 2m
Text Density
Very Dense

Subjects

Science Fiction, Fantasy, & MagicSpecimensToy and Movable BooksFathers and DaughtersImmortalitySupernaturalFantasy FictionDagboekenJeugdboeken ; VerhalenKärlekBarn- Och UngdomslitteraturOdödlighetÖvernaturligtKineserDiariesScience FictionSan Francisco

Places

USASan Francisco