illustrated by Jon Klassen
This book is about Triangle. This book is also about Triangle's friend Square. Also it is about a sneaky trick Triangle plays on his friend Square.
An NPR Great Read of 2017
A BookPage Best Book of 2017
A School Library Journal Best Book of the Year
Hudson Booksellers Best of 2017
★ “This shape showdown is pure, antic buffoonery.”
— Publishers Weekly, starred review
★ “A marvelously clever picture book. . . . Barnett and Klassen’s planned trilogy is shaping up to be an excellent one.”
— Booklist, starred review
— Quill & Quire
"Funnier with every read."
— National Post
— The Irish Times
"The supremely talented Mac Barnett and Jon Klassen team up in a funny and surreal picture book."
— Shelf Awareness