Nine Volumes of the Book of Heaven

There are nine volumes of the Heavenly Book, which are the books of the Nine Heavenly Emperors. It is said that only those who obtain the nine volumes of the Heavenly Book can be called emperors. The nine scrolls of heaven are divided into white scroll, green scroll, mysterious scroll, earth scroll, fairy scroll, ghost scroll, human scroll, demon scroll and heaven scroll. Legend has it that the Nine Heavens Emperor returned a volume of the book, called the Emperor Volume, but disappeared. Since then, everyone has known that there are nine volumes of the Heavenly Book, but they don't know that there is a tenth volume. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.