Este libro está de cabeza (This Book Is Upside Down)

Now in Spanish--Penelope Giraffe and Gus Penguin are at home on two different sides of the same world. When something looks upside down to Penelope, it looks right-side up to Gus! As they explore their opposite points of view, will the twosome ever see eye-to-eye? This side-splitting, one-of-kind story will have you standing on your head...which wouldn't look silly to Gus at all.