Scotland Yard's Ian Rutledge finds himself caught in a twisted web of vengeance, old grievances, and secrets that lead back to World War I in the nineteenth installment of the acclaimed bestselling series.

On the eve of the bloody Battle of the Somme, a group of English officers having a last drink before returning to the Front make a promise to each other: if they survive the battle ahead—and make it through the war—they will meet in Paris a year after the fighting ends. They will celebrate their good fortune by racing motorcars they beg, borrow, or own from Paris to Nice.

In November 1919, the officers all meet as planned, and though their motorcars are not designed for racing, they set out for Nice. But a serious mishap mars the reunion. In the mountains just north of their destination, two vehicles are nearly run off the road, and one man is badly injured. No one knows—or will admit to knowing—which driver was at the wheel of the rogue...