How does one endure 275 hours alone with Adolf Eichmann? How does one manage to tolerate the lies and excuses of someone who had deported millions of people to their deaths, including his own father? Avner Werner Less experienced exactly that. Now, Bettina Stangneth has reconstructed the book that the Eichmann interrogator himself could not finish. When he was asked to interrogate Eichmann in 1960, Less would have preferred to run away. He had lost too many during the Holocaust. However, he took on the task precisely for that reason: he wanted to understand. He began to write about Eichmann, about himself, noting what did not find a place in the 3564-page official interrogation protocol: questions, his thoughts, but also his disgust. All of this with keen observation, impressive judgment, subtle sarcasm, and above all, with the desire to explain to the world what he learned from the encounter.