Two that arrived from Amazon yesterday...
IBM and the Holocaust
: The Strategic Alliance Between Nazi Germany and America's Most Powerful Corporation http://www.amazon.com/IBM-Holocaust-...8933521&sr=1-1
: America's Corporate Connections to Hitler's Holocaust http://www.amazon.com/Nazi-Nexus-Cor...8933653&sr=1-1
Got them primarily for reference as I'm familiar with the story, but I heartily recommend these to those not satisfied with conventional explanations of some events, or if you're just curious why people tattoo numbers on other people.