The Ruler Of Darkness - LightNovelPub Learn more “He was a book. He was a book of scriptures.”His cover was made of the skin of those who hold a grudge against humans.His words were written with the blood of those who hold a grudge against heaven.His weave was created from the sinews of those who hold a grudge against earth.The heavenly demon, the ruler of darkness.Yeon Sang-hyeon, who signed a... Learn more