Books are a crucial medium for the inheritance of civilization. Without them to carry various forms of knowledge and record historical facts, future generations would have no way of knowing the past or inheriting accumulated wisdom, making it very difficult for civilization to progress.
Therefore, if one wishes to understand a place or even an entire world, books are the best tool.
Naturally, this is a magical world, so the library is filled mostly with books on magic, and those were precisely what Ye Feng wanted.
Chapter 423