In my opinion, book is an important thing. Book is the window of the world. By book, we can know everything. For example, we can not go to England for studying English, but we can learn English from the book. It can store many knowledge and information. Without being realized by us, people who can not study at school, can be a successful person. The key of their success is because their hobby is reading books. However, someone also needs some experiences. By some experiences, someone can open his/her mind about the world.If someone is too attached to the books, that person can be narrow-minded.
Usually that person can be introvert if he/she reads books too much. The conclusion from this topic is that reading a book and getting experiences are the important thing for developing our personality.