The Book of the Demon Emperor

In a magical world where the strong feast on the weak, Aran Wilford a weak magic cultivator who can only rely on his sword loses all hope, and when he was on the brink of his death, he finds a book. A book that belongs to a Demon Emperor! He didn't know then that it will not only change his life but it will completely change the fate of the world. . . . (Author's note: Hi everyone, this is my first book. Sorry for my bad English. If you realize something wrong or difficult to understand, please, leave a comment. I will fix it immediately.)