This book describes and seeks to explain the greatest crimes against humanity, perpetrated by German killing machines. The purpose of this book is not to rehearse atrocities. Rather it is to remind the world and the Germans themselves of something which cannot and should not be forgotten. "The worst crime you can commit today against yourself and society is to forget what happened and sink back into indifference. What happened is worse than you have any idea of. And it was the indifference of mankind that let it take place."