Gerald is careful. Piggie is not. Piggie cannot help smiling. Gerald can. Gerald and Piggie are best friends. In We Are in a Book! Gerald and Piggie discover the joy of being read. But what will happen when the book ends? Using vocabulary perfect for beginning readers (and vetted by an early-learning specialist), Mo Willems has crafted a mind-bending story that is even more interactive than previous Elephant & Piggie adventures. Fans of the Geisel Award-winning duo won't be able to put this book down--literally!