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Grey Sisters

Jo Treggiari

Cover of Grey Sisters

Grey Sisters

Age Rating, Reading Level & Content Guide

by Jo Treggiari

Reading Level 6 Unrated Ages 13+

The text is written at a 6th grade reading level, the subject matter is intended for teens (ages 13+), and the content is gentle with no concerning themes.

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About This Book

Two years after a deadly plane crash, best friends D and Spider head into the mountains to face their grief. A gripping psychological thriller for fans of The Cheerleaders and Sadie. D and Spider have always been close friends, and they are further united in their shared heartbreak: they both lost siblings in a horrific plane crash two years earlier. A chance sighting of a beloved cuddly toy in a photograph of the only survivor spurs D to finally seek closure. She and Spider and their friend, Min, set off on a road trip to the mountainside site of that terrible crash. Ariel has lived on the mountain all her life. She and her extended family are looked down upon by neighboring townsfolk and she has learned to live by her wits, trusting few people outside of her isolated, survivalist community. A terrifying attack sends her down the mountain for help; on her way, she comes upon the three girls -- a chance encounter that will have far-reaching consequences for them all.

Quick Assessment

This is a Level 6 book. No notable content concerns flagged. Written for readers ages 13+.

Why we rated Grey Sisters Level 0

Grey Sisters is written at a Level 6 reading level across 288 pages. Strong independent readers around grade 7.0 can typically handle this book on their own; with parent or teacher support, Grey Sisters works for readers up to grade 8.0.

We rate Grey Sisters as Unrated because the content sits in the "Unrated" range — no conflict beyond everyday childhood experiences.

No specific content flags were raised by community reviewers, which is consistent with the unrated intensity score.

Good fit for

  • Children in the Ages 13+ range — the maturity and attention span match the story's pacing.
  • Patient readers who enjoy slower, character-driven stories.

Maybe not for

  • ! Reluctant readers who need a fast hook — the pacing here rewards patience.

For Parents

Content Intensity

Level 0 — Unrated
Gentle Mild Moderate Intense Very Intense

This book has not yet been rated for content intensity.

Data confidence: standard

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

Reading Insights

Hook Factor

1/10

A steady, thoughtful read that rewards patient readers.

Discussion Potential

1/10

A lighter read — great for independent enjoyment.

Book DNA

Multi-dimensional content fingerprint

Vocabulary Level
5
Theme Richness
1
World Scope
1
Data Confidence
4

Details

Book Length

288 pages
ISBN
9780735263000
Pages
288
Publisher
National Geographic Books
Published
2020
Type
Fiction

Genres

Subjects

Young Adult Fiction, HorrorYoung Adult Fiction, Social Themes, FriendshipYoung Adult Fiction, Thrillers & Suspense, General