You cannot invent an algorithm that is as good at recommending books as a good bookseller.
John GreenDon't lie to anyone, but particularly don't lie to millennials. They just know. They can smell it. Be yourself: if you're old, be old. If you don't know anything about pop culture, don't pretend to know anything about pop culture. When you credit teenagers with intelligence and emotional sophistication, they respond intelligently and with emotional sophistication.
John GreenFrankly, I kind of want you to be haunted by the unansweredness of the question, because I think being haunted by such things is a valuable part of being a person.
John Green