PROCLAMATION! A manifesto on picture books, signed by Mac Barnett, Brian Biggs, Sophie Blackall, Lisa Brown, Kevin Cornell, Carson Ellis, Isol, Laurie Keller, Jon Klassen, Matthew Myers, Tao Nyeu, Sean Qualls, Aaron Renier, Adam Rex, Christian Robinson, Jon Scieszka, Dan Santat, Lemony Snicket, Erin E. Stead, Philip C. Stead, Scott Teplin, and Maria van Lieshout.