Yusuke Yonezu was born in Tokyo, Japan, where he still lives with his wife and children. As a child he loved to draw and make toys out of paper and boxes. He went on to study design and became the creator of many board books, puzzles, and toys beloved by children and their caregivers around the world.Yonezu's board books are full of bold colors and help young readers master basic concepts, including counting skills, animals, foods, shapes, and more. The designs help readers of all ages see the world in a new way and discover new surprises with each turn of the page.

"The book not only appeals to the imagination, but it invites touch: little fingers will want to trace the triangular die cuts, and readers may even peek through as they search for more triangular shapes beyond the book. A smart and engaging book that will encourage the imaginations of children, all while teaching them to recognize triangles." Kirkus Reviews starred review