James Comey was the director of the FBI between 2013 and 2017, when he was fired by Donald Trump. He is perhaps most famous for his decision to go public with his re-opening of the investigation into Hillary Clinton's emails just days before the 2016 Presidential election. Here he reflects on that decision, says that Trump reminded him of a 'mob boss' and that the former President is a "really bad person, so bad that it's very, very difficult for people to conceptualise". Comey also discusses the United States' use of water-boarding on detainees, recalls his prosecution of the Gambino crime family, and gives his views on US law enforcement. His debut novel, Central Park West, is out now.