Paul Raeburn is the award-winning author of several books, including Do Fathers Matter?, a National Parenting Publications Gold Medal winner and a Mom's Choice Award winner, and Acquainted with the Night, a memoir of raising children with mental illness. His articles have appeared in Discover, The Huffington Post, The New York Times Magazine, Scientific American, and Psychology Today, among many others. He lives in New York City. Kevin Zollman is a game theorist and an associate professor of philosophy at Carnegie Mellon University. His work has been covered in The Wall Street Journal, The New Yorker, Scientific American, and elsewhere.