First of all, reading a book is like talking to its author, and one will never be bored. Sweet stories in the book can cheer me up, while sad stories can win my sympathy and pity.
Secondly, reading can enlarge my vocabulary. When I meet a new word, I can easily understand it with its context. I can learn to use it, too. Remember it.
In a word, books are the love of my life and the light that illuminates my life.