May 1945. In the aftermath of the Second World War, 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. One of the lead investigators is Lieutenant Hanns Alexander, a German Jew who is now serving in the British Army. Rudolf Höss is his most elusive target. As Kommandant of Auschwitz, Höss not only oversaw the murder of more than one million men, women, and children; he was the man who perfected Hitler's program of mass extermination. Höss is on the run across a continent in ruins, the one man whose testimony can ensure justice at Nuremberg.

Hanns and Rudolf reveals for the very first time the full, exhilarating account of Höss's capture, an encounter with repercussions that echo to this day. Moving from the Middle Eastern campaigns of World War I 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--one Jewish, one Catholic--whose lives diverged, and intersected, in an astonishing way. This is "one of those true stories that illuminates a small justice in the aftermath of the Holocaust, an event so huge and heinous that there can be no ultimate justice" (New York Daily News).