Most Incredible Books, The original title of this book, but it is still known as the "Bible of the Devil." Who and why it was written is still unknown. Legend has it that it was written by a monk, who was locked up for breach of monastic principles, and he vowed to only one night to write the largest manuscript in the world. When he realized that he could not fulfill his vow then began to pray to the devil, and he heard his prayer.