Michael Dregni, Django: The Life and Music of a Gypsy Legend (New York: Oxford U. Press, 2004) ("On November 5, 1942, SS leader Heinrich Himmler's proposition to exterminate Romanies, Jews, and others won Hitler's approval, and the Nazis began sending German Gypsies to their death in the new camp at Auschwitz. An estimated 20,000 French Gypsies soon followed them to German and Polish death camps, where 18,000 of them were terminated." Id. at 168-169.).
Peter Matthiessen, In Paradise (Farmington Hills, MI: Thorndike Press, 2014) (From the back cover: "In the late autumn of 1996, more than a hundred people gather at the site of a former death camp. For a week, they offer prayer and witness at the crematoria and meditate in all weathers on the the selection platform. They eat and sleep in the quarters of the men who sent over a million Jews to their deaths. They are joined by an American academic of Polish descent, there to complete research on the suicide of a survivor. As the days pass, tensions surface among the participants, stripping away any easy pretense to resolution or healing.").
Simon Schama, The Story of the Jews: Finding the Words 1000 BC - 1492 AD (New York: Ecco, 2014).
Simon Schama, The Story of the Jews, Volume Two: Belonging 1492-1900 (New York: Ecco, 2017).
Giuliana Tedeschi, There Is a Place on Earth: A Woman in Birkenau, translated from the Italian by Tim Parks (New York: Pantheon Books, 1982).