""Brock and Kolla's meticulous, psychologically astute sleuthing fascinates." --Entertainment Weekly on No Trace The annual Chelsea Flower Show is one of the tourist highlights of London. But this year, the event is tainted by the murder of an American tourist in a random act of violence. But when DCI David Brock's Serious Crime division of Scotland Yard investigates, they quickly discover that the killer somehow avoided having both his face and his...