The 91-story treehouse

Name: The 91-story treehouse
Author: Andy Griffiths
ISBN: 9781250104885

Age Rating, Reading Level & Content Guide

Babysitting blunders!

by Andy Griffiths

Treehouse Books

Reading Level 3-4 C · Gentle Ages 9-12 Balanced Read Page-Turner

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. Its HootRating code, C, means gentle content.

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About This Book

Join Andy and Terry as they explore their incredible 91-story treehouse filled with wild inventions like a gigantic submarine sandwich shop, an air-traffic control tower, and a human pinball machine. Each level unlocks a new burst of hilarious adventures and imaginative fun that will keep you laughing and wondering what’s next! Perfect for readers who love humor and creativity in every corner.

Themes

HumorImaginationAdventure FriendshipCreativity

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 91-story treehouse C (Gentle)

The 91-story treehouse is written at a Level 3-4 reading level across 376 pages (approximately 14,458 words). Reading-wise, most kids in grade 4 and up can manage The 91-story treehouse on their own; younger readers can enjoy it with a parent or teacher reading along.

Read aloud, The 91-story treehouse runs about 1.6 hours — long enough to span several bedtime sessions.

We rate The 91-story treehouse as C (Gentle) 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 91-story treehouse explores humor, imagination, adventure, friendship, 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 humor, imagination, adventure.
✓ 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

C · Gentle

Emotional

Gentle

Physical

Gentle

Social

Gentle

Thematic

Gentle

Reading the HootRating code: the first letter is the content intensity (C = Gentle · L = Mild · M = Moderate · I = Intense · V = Very Intense); the second, when there is one, is the kind of content that drives it (E = Emotional · P = Physical · S = Social · T = Thematic). Reading level and age range are rated separately. How we rate

No conflict beyond everyday childhood experiences. Safe for sensitive readers.

Data confidence: standard

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