People should read only those books that are about real events, real people, and established facts. Use specific reasons and details to support your opinion.
I really disagree with this sentence, I  think art is the only place where you can transgenss all the limits, so doesn't matter if the things you are portraying are real or not, you can express what you're thinking, so in the especific case of literature, limits this importance only to the completely real things and events would limit it in the freedom art has. In literature much of the things you can read are metaphors of real events, real persons, real situations and forms of seeing life and it different aspects. Reading this ''unreal'' things estimulates the mind, makes you think about the meaning of the things you're reading and you can make your own interpretations about this things. In ocasions you may not realize that you're understanding situations of the real life reading not real life situations. Is important to estimulates our minds with art and creations, we must give birth to our imaginations. Do not forget to inform yourself about real events with real people, but make a good thing for your mind and your imagination and read ''unreal'' things.
Read books that are about real events, real people and established facts are good and contribute in our formation of opinion, but ''unreal'' thing estimulates our minds,our imagination, and our souls.