What reading level is The 78-story treehouse?

The 78-story treehouse by Andy Griffiths is at a Level 3-4 reading level. Recommended for Middle Grades readers (Ages 9-12).

What age is The 78-story treehouse appropriate for?

The 78-story treehouse is recommended for Ages 9-12. HootRating: 8C (Clear).

What genre is The 78-story treehouse?

The 78-story treehouse is fiction — Juvenile Fiction. Part of the Treehouse Books series.

Does The 78-story treehouse have any content warnings?

The 78-story treehouse has a HootRating of 8C (Clear). No specific content flags noted. On HootRated, every book is rated across four dimensions — emotional, physical, social, and thematic — to help parents make informed choices.

How many pages is The 78-story treehouse?

The 78-story treehouse by Andy Griffiths is 375 pages (approximately 11,519 words).

Reviewed by HootRated editorial · Last updated May 18, 2026

The 78-story treehouse

Andy Griffiths

The 78-story treehouse

Age Rating, Reading Level & Content Guide

Moo-vie Madness!

by Andy Griffiths

Illustrated by Denton, Terry, illustrator

Treehouse Books

Reading Level 3-4 8C 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.

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About This Book

Andy and Terry team up to protect their creative ideas from a group of sneaky spy cows, navigating hilarious challenges inside their amazing 78-story treehouse. Their wild adventure is filled with fun, friendship, and imaginative surprises that will keep readers laughing and cheering. Get ready for a playful journey where teamwork turns the impossible into the extraordinary!

Themes

Friendship Humor AdventureImaginationAuthors

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 78-story treehouse 8C

The 78-story treehouse is written at a Level 3-4 reading level across 375 pages (approximately 11,519 words). Strong independent readers around grade 4.6 can typically handle this book on their own; with parent or teacher support, The 78-story treehouse works for readers up to grade 5.6.

Read aloud, The 78-story treehouse runs about 1.3 hours — long enough to span several bedtime sessions.

We rate The 78-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 78-story treehouse explores friendship, humor, adventure, imagination, and authors — 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, humor, 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.