I fortunately come from generations past that learnt to think using paper. If I have to cut off my right arm to escape computer addiction, I can do that. Generations now and especially in the future will quite literaly be unable to think straight without an electronic device in their hand. To them, life will be brutually stressful with no inner peace to be found because they will be assaulted non-stop by disingenuous companies who have every kind of life-sapping wares to peddle.
Altogether, I think we ought to read only books that bite and sting us. If the book does not shake us awake like a blow to the skull, why bother reading it in the first place? So that it can make us happy, as you put it? Good God, we'd be just as happy if we had no books at all; books that make us happy we could, in a pinch, also write ourselves. What we need are books that hit us like a most painful misfortune, like the death of someone we loved more than ourselves, that make us feel as though we had been banished to the woods, far from any human presence, like a suicide. A book must be the ax for the frozen sea within us. That is what I believe.
There are two novels that can change a bookish fourteen-year old's life: The Lord of the Rings and Atlas Shrugged. One is a childish fantasy that often engenders a lifelong obsession with its unbelievable heroes, leading to an emotionally stunted, socially crippled adulthood, unable to deal with the real world. The other, of course, involves orcs.
But cast away the thirst after books, that thou mayest not die murmuring, but cheerfully, truly, and from thy heart thankful to the gods.
Remember how long thou hast been putting off these things, and how often thou hast received an opportunity from the gods, and yet dost not use it. Thou must now at last perceive of what universe thou art a part, and of what administrator of the universe thy existence is an efflux, and that a limit of time is fixed for thee, which if thou dost not use for clearing away the clouds from thy mind, it will go and thou wilt go, and it will never return.