Since the beginning of time we have seen instances when the sanctity of human life has been tarnished and blood has been spilt. The Biblical story of Cain and Abel is itself a testament to the fact that Mankind can be open to horrible acts of cruelty against each other and also against one’s own soul.

Most of these instances have been fueled by human motive such as revenge or jealousy. But sometimes, through the course of history, some people have violated this sanctity and derived pleasure out of the cruelty of their ways.

They have shown absolutely no moral repulsion for their actions, and thus become one of the most famous people on Earth, for their ruthless spillage of blood, that left them completely devoid of all human compassion.

This book explores the stories of just a few, in an effort to understand the workings of their mind, and the true psychology of a killer.