A billionaire, two-a-penny in thrillers at the moment, Jon van der Sandt, loses his family to an attack by Isis terrorists in a Cyprus resort. He avenges them by having the jihadis nabbed by mercenaries in Syria and flown to his vast estate in America, where he plans to hunt them as he does big game. Only there’s been a mistake. One of the group, Raj Patel, isn’t an Islamic fanatic but a British doctor who has been treating injured civilians. Previously he was a Royal Marine commando.