Philippe Sands blends personal memoir, historical detective work and gripping courtroom drama to probe a secret double story of mass murder, one that reveals a shocking thread that links the horrors of the 1940s with those of our own times. The house at 38 Londres Street is home to the legacies of two men whose personal stories span continents, nationalities and decades of atrocity: Augusto Pinochet, President of Chile, and Walther Rauff, a Nazi SS officer responsible for the use of gas vans. On the run from justice at the end of the Second World War, Rauff crosses the ocean to southern Chile.

He settles in Punta Arenas, Patagonia, managing a king crab cannery at the end of the world. But there are whispers about this discreet and self-possessed German – rumours of a second career with Pinochet’s secret intelligence service, the dreaded DINA. In 1998, Pinochet is in a London medical clinic when the police enter his room and arrest him on charges of crimes against humanity and genocide.

Philippe Sands is called to advise the former head of state on his claim to immunity, but will instead represent a human rights organisation against him. Years later, Sands makes a discovery while working on another book which reignites his interest in the case and leads to a decades-long investigation into Pinochet’s crimes, his unexpected connection to Rauff and the former Nazi’s possible connection to Chile’s disappeared.