How Old Is Mr. Tortoise?

From the author of I Dont Want to Be a Frog comes a hilarious new picture book that asks readers to solve one very important mysteryIts Mr. Tortoises birthday, and he cant wait to eat cake with his friends. But theres a hitch! Mr. Tortoise cant remember how old he is, so his friends dont know how many candles to put on the cake. And they wont stop (or slice) until they figure out the mystery.Could Mr. Tortoise be as many years old as there are sections on his shell? Hes 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 Dont Want to Be a Frog author Dev Petty and hilarious graphic novelstyle illustrations from Ruth Chan, How Old Is Mr. Tortoise? will have readers guessing the answer from beginning to end.