What also cry tears of blood

A book that returns relentlessly every political regime of the twentieth century against its abominations, his deliberate cruelty, its planned genocide. Many stories we had almost saturated horrors, it opens up appalling perspectives on the atrocious and murderous policies that murdered millions of men, women and innocent children, opponents of these regimes or terror mere humans just trying to keep a little dignity. Famines organized large-scale, arbitrary executions, widespread deportations ... or how Russia and Germany have worked to massacre their people .... and more! This is not a novel, it is the historical truth documented with meticulous care, but it is so "hard" to read!