How Old Is Mr. Tortoise?


From the author of I Don’t Want to Be a Frog comes a hilarious new picture book that asks readers to solve one very important mystery


ISBN: 9781419746703 Category:

Dev Petty


It’s Mr. Tortoise’s birthday, and he can’t wait to eat cake with his friends. But there’s a hitch! Mr. Tortoise can’t remember how old he is, so his friends don’t know how many candles to put on the cake. And they won’t stop (or slice) until they figure out the mystery.

Could Mr. Tortoise be as many years old as there are sections on his shell? He’s twice as big as the smaller tortoise . . . so is he twice as old? After the partygoers work through a variety of possibilities, they find their way to the answer with a simple bit of addition.

With text from I Don’t Want to Be a Frog author Dev Petty and hilarious graphic novel-style illustrations from Ruth Chan, How Old Is Mr. Tortoise? will have readers guessing the answer from beginning to end.

Additional information

Weight 452 g
Dimensions 25.1 x 24.8 cm
Publisher name ABRAMS
Publication date 23 June 2022
Number of pages 40
Format Hardback
Contributors Illustrated by Ruth Chan
Dimensions 25.1 x 24.8 cm
Weight 452 g


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Dev Petty used to be a painter in movies-such as the Matrix films and others-but now she is the author of many books for children, including I Don't Want to Be a Frog and its companion titles. She lives in the San Francisco Bay Area, and you can find her at Ruth Chan spent her childhood tobogganing in Canada and her teens in China before studying art and education, and working with youth and families in underserved communities. She is the author and illustrator of The Alpactory: Ready, Pack, Go! and Thank You, Neighbor! She now writes and illustrates full-time in Brooklyn, New York. Visit for more info.