How Old Is Mr. Tortoise?

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.