Internationally renowned investigative journalists Anthony Summers and Robbyn Swan (The Eleventh Day: The Ultimate Account of 9/11) return to Hay Festival Kells to talk about their 2014 bestseller Looking for Madeleine, about the 2007 disappearance of Madeleine McCann. They discuss the overwhelming and often troubling response to the book on social media. Chaired by Myles Dungan.