When the June 22, 1941 the German army crossed the border of the Soviet Union began one of the most shocking episodes of the Second World War. We know the famous battles and we have seen the rising Red Army flag over the Reichstag. Less has been written about an atrocious reality. Namely, that the conquered land was the scene of a practical extermination of different peoples, and mainly the Jewish people, the lives of millions of innocent people were killed. The massacres and concentration camps raised with the same haste with which death was given, were not merely a consequence of the war. On the contrary, the extermination was his rationale. The German army acted according to a systematic plan designed in Berlin and pragmatic born racist Third Reich.Ilya Ehrenburg and Vasily Grossman compiled the testimonies of survivors for the world to know the unfathomable magnitude of horror. Hundreds of testimonies arriving at his hands or collected through interviews with victims served to erect a monument made of blood and heroism, of those who suffered confinement in ghettos and took the road to implementation; that of the few who dared to challenge the executioners. Vetoed publication by Stalin and become secret manuscript, The black book has come to us as miracles go, as always appears the truth.Which tells of horror suffered by the men and the dignity with which faced martyrdom