"[Adam] Rex delivers a storytime home run—hilarious, heartfelt, instructive, and interactive."—Booklist, starred reviewA sweet and appealing tale for anyone familiar with the universal tendency of young children to always ask WHY?When supervillain Doctor X-Ray swoops in threatening to vanquish an innocent crowd, the only one brave enough not to run away is a little girl, who asks him simply, "Why?" He is taken aback—but he answers. She keeps asking. And he keeps answering—unt