The Rise and Fall of the Third Reich by William Shirer
Wow, I have the greatest respect for WS. It is just amazing that he could have had a count of the victims during all the chaos that was WW2. And amazing that he could be so evil.
Contrast that with the article on the Great Escape concerning the prison run by the Luftwaffe in which the prisoners were treated with respect and dignity. One of the prison German commandants was invited to Toronto (and maybe the US) in the 60s for a reunion with former prisoners.