Hanns Alexander was the son of a wealthy German family who fled Berlin for London in the 1930s. Rudolf Höss was a farmer and soldier who became Kommandant of Auschwitz and oversaw the deaths of over a million people. In the aftermath of World War II, the first British War Crimes Investigation Team is assembled to hunt down the senior Nazi officials responsible for the greatest atrocities the world has ever seen.

Lieutenant Hanns Alexander is one of the lead investigators, Rudolf Höss his most elusive target. In this book, Thomas Harding reveals for the very first time the full, exhilarating account of Höss' capture. Moving from the First World War to bohemian Berlin in the 1920s, to the horror of the concentration camps and the trials in Belsen and Nuremberg, it tells the story of two German men whose lives diverged, and intersected, in an astonishing way.