Reviewed by HootRated editorial · Last updated
The 39-Story Treehouse
Andy Griffiths
The 39-Story Treehouse
Age Rating, Reading Level & Content Guide
by Andy Griffiths
The text is written at a 3rd grade reading level, the subject matter is intended for middle graders (ages 9–12), and the content is gentle with no concerning themes.
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About This Book
Andy and Terry have taken their treehouse to new heights with 39 incredible stories stacked high! Inside, they've created a magical machine that helps bring their wildest tales to life, making every day an exciting adventure filled with imagination and fun.
Themes
Quick Assessment
This is a Level 3-4 book with gentle content intensity. No notable content concerns flagged. Written for readers ages 9-12.
Why we rated The 39-Story Treehouse 8C
The 39-Story Treehouse is written at a Level 3-4 reading level with a Lexile measure of 610L across 352 pages (approximately 12,918 words). Strong independent readers around grade 4.7 can typically handle this book on their own; with parent or teacher support, The 39-Story Treehouse works for readers up to grade 5.7.
Read aloud, The 39-Story Treehouse runs about 1.4 hours — long enough to span several bedtime sessions.
We rate The 39-Story Treehouse as 8C ("Clear") because the content sits in the "Gentle" range — no conflict beyond everyday childhood experiences. Across our four dimensions (emotional, physical, social, thematic) the book reads as evenly gentle; no single dimension stands out as a concern.
No specific content flags were raised by community reviewers, which is consistent with the gentle intensity score.
Thematically, The 39-Story Treehouse explores friendship, adventure, humor, fantasy world-building, and creativity — 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 friendship, adventure, humor.
- ✓ Readers who fall hard for one book and want a long series to live in — there are 12 more books in the Treehouse Books series.
Maybe not for
- ! Readers looking for something heavier — this is a gentle, low-stakes story by design.
For Parents
Content Intensity
8C — ClearNo conflict beyond everyday childhood experiences. Safe for sensitive readers.
Was our "Gentle" content intensity rating accurate for this book?
Reading Insights
Hook Factor
9/10High engagement — fast-paced, fun, and hard to put down. Great for reluctant readers.
Discussion Potential
1/10A lighter read — great for independent enjoyment.
Book DNA
Multi-dimensional content fingerprint
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Details
Book Length
- ISBN
- 9781250026927
- Pages
- 352
- Publisher
- Feiwel & Friends
- Published
- Apr 07, 2015
- Type
- Fiction
- Word Count
- 12,918
- Lexile
- 610L
- Read-Aloud
- ~1h 26m
- Text Density
- Picture-Heavy