'On the second day of 2020, my partner and I caught a train through the suburbs of Munich to Dachau, then a bus to the Dachau Concentration Camp Memorial Site. It was bitterly cold, the morning air nipping our cheeks. Frost crunched beneath our feet and weak sunlight drifted through clouds. At the site, we passed beneath the grim words ‘Arbeit macht frei’, soldered onto the entrance gates (as they also were in Auschwitz and other concentration camps). We moved slowly through the rectangular buildings, reading squares of information about the inhumane treatment of the prisoners. By the time we emerged from the last building, we were weighed down with horror.' (Introduction)