This book depicts the crime against humanity committed by Lenin and Stalin through Secret Police and espionage agencies and slave labor camps in the USSR. To run the minority dictatorial government serving the interest of the aristocrats and intellectuals turned communists, both Lenin and Stalin had to terrorize the people through mass killing and other repressive means. Moreover a large number of the political opponents were sent to Gulags (forced labor camps) which played a crucial role in economic development of Communist Russia. This booklet describes these inhuman feature of the USSR.