First of all, you can kill time (this is better than surfing the Internet).

Some books can make you feel better and relax yourself (of course, some books may be painful to read)

Some books can learn knowledge.

Some books will broaden people's horizons and improve people's spiritual realm and cognition of things.

Some books may even change people's values, outlook on life and world outlook.

Reading is a great hobby. The fun of books lies not only in reading, scouring books, visiting libraries, and exchanging new books and feelings with colleagues, but also in interesting things. It is also quite a sense of accomplishment to see many books I have read neatly stacked on the shelf.