Take this book to the third world

It is said that there were three realms in the ancient world, among which there were people, ghosts, demons and gods< Br> unfortunately, in ancient times, it was hit by meteorites, the environment of the three worlds changed, and both the sky and the earth were destroyed. Only mortal humans survived, lived and multiplied, and have developed to this day< Br> but is this really the case< Br> after being accidentally killed, the man got a book and met the legendary things. These are different from what he saw and heard, so he had to change his view