"Sir Isaac Genius!" begins with the story of Zoey Zebra and her best friend, P.B., the panda bear. They discover a treasure chest left for Zoey by her grandpa. When the two friends open the chest, it's filled with hundreds of keys. Each key opens a new treasure chest that unlocks one key to knowledge and wisdom, two very different things. This series has 60 beautifully illustrated books on Mathematics, Science, Zoology, Literature, and more. Each child will learn about Calculus.