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Cover of The 13-Storey Treehouse

Age rating and parents' guide:The 13-Storey Treehouse

by Andy Griffiths & Terry Denton

Ages 9–11

The 13-Storey Treehouse by Andy Griffiths & Terry Denton is best for children aged 9–11. It has mild violence, nothing scary, no romance and no bad language.

Andy and Terry live in an incredible multi-level treehouse packed with amazing inventions, from a see-through swimming pool and a bowling alley to a giant marshmallow machine. The two friends need to write their next book, but absurd distractions keep getting in the way, including flying cats, giant sea monsters, and unruly monkeys. Packed with wacky illustrations, slapstick humor, and frantic energy, this inventive tale keeps young readers laughing from start to finish.

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Content ratings

How much of each a parent can expect, from none to strong.

Violence
Mild
Scary moments
None
Romance
None
Bad language
None
Dhiraj Bodade

Content checked by Dhiraj Bodade, co-founder of Bookstaken, on 21 September 2026.

At a glance

  • ★Early chapter book
  • ★Part of the Treehouse series
  • ★Easy to get into from the first page
  • ★Plenty of illustrations
  • ★Emotionally light
  • ★A good pick for reluctant readers

Great for kids who like

  • Humor & Comedy
  • Animals
  • Science

Reading mood

  • Funny

Good to talk about

  • Science
  • Robots & inventions

Books like The 13-Storey Treehouse

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    Frank Einstein is a kid genius who loves tinkering, inventing, and exploring how the physical world works. After a bolt of lightning strikes his garage laboratory, two self-assembled robots—Klink and Klank—spring to life with very different personalities. Together, they work on an ambitious science project, only to face competition from Frank's rival, T. Edison. Packed with engaging illustrations, real scientific principles, and plenty of slapstick humor, this is an entertaining, fast-paced read for curious minds.

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    Malgudi Adventures: Classic Tales for Children

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    Set in the bustling, fictional South Indian town of Malgudi, this collection brings together charming tales of everyday childhood, curious animals, and gentle misadventures. Young readers meet unforgettable characters like Swami and his mischievous school friends as they navigate classroom troubles, family dynamics, and unexpected encounters, including a memorable tiger on the loose. Told with warm humor and vivid local detail, these stories offer an inviting glimpse into Indian life and the universal joys and trials of growing up.

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  • Cover of Cricket for the Crocodile

    Ages 6–11

    Cricket for the Crocodile

    by Ruskin Bond

    Ranji and his friends love playing cricket on the riverbank, but Nakoo the grumpy crocodile is not pleased when their games disturb his sunbathing. When an errant cricket ball strikes Nakoo, a hilarious chase ensues, causing chaos for players, bank clerks, and spectators alike. Ruskin Bond blends gentle humor with the warmth of small-town Indian life in this charming tale. Young readers will enjoy the lively, comical standoff between determined boys and an equally stubborn reptile.

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  • Cover of Diary of a Wimpy Kid

    Ages 9–11

    Diary of a Wimpy Kid

    by Jeff Kinney

    Greg Heffley is starting middle school, where undersized weaklings like him share the hallways with kids who are taller, meaner, and already shaving. To survive, he records his daily misadventures, family annoyances, and flawed plans for popularity in an illustrated journal. Written in a sharp, self-absorbed voice and packed with cartoon sketches, it offers a laugh-out-loud look at adolescent insecurity that reluctant and avid readers alike find hilarious.

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    The World's Worst Children

    by David Walliams

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    Malgudi Schooldays: The Adventures of Swami and His Friends

    by R. K. Narayan

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Questions parents ask

Q: What age is The 13-Storey Treehouse for?
The 13-Storey Treehouse suits children aged 9–11. It is an early chapter book: easy to get into from the first page, plenty of illustrations.
Q: Is The 13-Storey Treehouse appropriate for a 9 year old?
Yes. Bookstaken rates it for ages 9–11. It has mild violence, nothing scary, no romance and no bad language.
Q: Is The 13-Storey Treehouse part of a series?
Yes, it belongs to the Treehouse series. If your child enjoys it, the other Treehouse books are the easiest next step.
Q: What should my child read after The 13-Storey Treehouse?
Try Frank Einstein, Malgudi Adventures: Classic Tales for Children and Cricket for the Crocodile. They share the same kind of story and suit the same ages.
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