After passing the first three floors of the demon tower, Qin Fang knew that the higher up he went, the more advanced things might exist in the demon tower.
As he thought, the fourth floor of the demon tower was actually a library.
Where Qin Fang looked, there were some bookshelves, and on those bookshelves, there were a variety of books in order.
Qin Fang simply estimated that there were nearly ten thousand books in those collections.
Moreover, on each bookshelf, there are primitive seal characters carved.
Qin Fang subconsciously came to the medicine bookcase, casually took out a book and opened it