THIS YEAR S MOST GRIPPING THRILLER AND SUNDAY TIMES CRIME BOOK OF THE MONTH A high-altitude, high-stakes thriller. I loved it MATT HAIG Had me on the edge of my seat. A must read for 2022 SARAH PEARSE Suffocatingly tense, highly original and exhilarating DAILY EXPRESS Tense, chilling and terrifying CLAIRE DOUGLAS Chilling, vivid and entirely unique ABIGAIL DEANSIX STRANGERS. ONE KILLER. AND NO ESCAPE .