The first book, Before the Sun and Moon, hangs in the palace. We need to complete the investigation task of the immortals and get the books before the sun and the moon. Then look for "Geography and Hydrology of White Night Country", which is in the secret room treasure chest in the maze. We need to enter the secret room first, open the treasure chest at the root of the wall, and start to act before we can get Geography and Hydrology of White Night Country.

The third book is The Legend of the Dragon and Snake forever, which is in Bachongtang Bookstore. We need to buy it at Bachongtang Bookstore in Dodge City.

The fourth book, Shadow of Light and Sun, is located at the altar of the snake heart. After touching different patterns, a treasure chest will appear. When you open the treasure chest, you will get the light and the shadow of the day.

The last book, Experimental Records of Deep-sea Dragon Lizards, is located inside the Japanese Imperial Palace. We need to go to the depths of the prison and find the experimental records of the deep-sea dragon lizard.