This book was astonishing. I have read and watched a lot of things about the Einsatzgruppen, and it never fails to astonish me. These were killing squads, dedicated murdering groups that tromped around putting a full day of work in shooting people one after another. I cannot imagine killing hundreds of people like that for a job. World War II really brought out the worst in so many people, and cruelty was just common place. I found this book to be very informative about the formation and duties of these squads, but it was mentally taxing to sit and read straight through.