Book Series · 3 Books

Shape Trilogy Books

In order from Triangle to Circle.

The Shape Trilogy series is a set of 3 picture books by Mac Barnett, published between 2017 and 2019. Written for ages 5–9, most books run about 45 pages.

Triangle
Square
Circle
Triangle
Circle
Triangle
Square
Where the story begins

First Book in the Series

Triangle
Sale price
$1498
Book #1 · Picture Book · Ages 5–9 · 2017

Triangle

By Mac Barnett, Jon Klassen (Illustrator)

A triangle plays a trick on a square, but the square gets revenge.

46 pages· 314 words· Est. 3 min read-aloud
5.1/7 Bookroo
$15.99Save 6%
Hardcover
Summary: In a world of shapes, Triangle plots a sneaky trick on his friend, Square. But as plans unfold, the question arises: who is truly the trickster? Dive into a tale of cleverness and surprise, where trust is as slippery as the shapes themselves. Will Triangle's plan succeed, or does Square have a trick of his own?
The complete set

Shape Trilogy Series

3 books · Published 2017–2019

Series
Sale price
$1498

Triangle

Picture Book · Ages 5–9 · 2017

A triangle plays a trick on a square, but the square gets revenge.

Sale price
$1498

Square

Picture Book · Ages 5–9 · 2018

Square, a block-pusher, is mistakenly called a genius by Circle, and he tries to create a sculpture of her.

Circle

Picture Book · Ages 5–9 · 2019

A group of shapes play a game of hide and seek near a waterfall.

Good to know

Common Questions

How many books are in the Shape Trilogy series?

There are 3 books in the Shape Trilogy series. It began with Triangle in 2017, and the newest book, Circle, was published in 2019.

What ages are the Shape Trilogy books best for?

The series is best for ages 5–9, based on the age ranges of the individual books.

Which Shape Trilogy book is the longest?

Circle is the longest book in the series at 464 words (48 pages).

Which Shape Trilogy book is the shortest?

Triangle is the shortest at 314 words (46 pages).

The people

The Creatives Behind the Books

The people who bring Shape Trilogy to life.

01

Mac Barnett

Author
02

Jon Klassen

Illustrator

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