Solomon never thinks it's strange that he has two belly buttons—until he finds out that no one else does. Is having that extra belly button good or bad? Things look worse and worse until an unexpected encounter makes Solomon appreciate what it means to be a little bit different. This one-of-a-kind story from bestselling author Stephen J. Dubner ( Freakonomics ) and illustrator Christoph Niemann will strike a chord with anyone who feels like an exception to the rule. Stephen J. Dubner is an award-winning author, journalist, and radio and TV personality. He quit his first career—as an almost rock star—to become a writer. He has since taught English at Columbia, worked for The New York Times , and published three non-Freakonomics books. Christoph Niemann is an illustrator, author, and animator. His work has been the subject of numerous museum retrospectives and appears regularly on the covers of the New Yorker and the New York Times Magazine . His acclaimed books for children include Words , The Pet Dragon , and Subway . Christoph Niemann lives in Berlin, Germany, with his family.