Dan Kois and Rebecca Onion write: “On October 8, 2010, The New York Times ran a story on its front page: ‘Picture Books No Longer a Staple for Children.’ The next year, a group of 21 creators issued a picture-book manifesto. Picture books have undergone a revolution in the past 25 years—one that was already underway before that Times obit, but which that manifesto helped spur along. The art form is now remarkably different from what it was when we were little. To make this guide, we surveyed more than a hundred authors, illustrators, librarians, booksellers, academics, and publishing pros.”