For some reason I got my hands on George Orwell's "Animal Farm" at a very young age, as it looked like a kid's book. That's a fairly bleak book, for example when the pigs sell the draft horse to the glue factory, but only the goat (whose only friend is the horse) knows what's going on. Watership Down is another good one, the character of the Black Rabbit of Inle (the Grim Reaper of rabbitkind) was memorable. However…
The right there was on of the most instrumental decisions of my life.
By 5th grade I'd read the entire high school literature section. I joined an adult book readers club to better understand what I was reading. Even the adults in my club agreed an adult life is continual situational ignorance, misunderstood tragedy, betrayal by those close to you, and servitude to the powerful. I no longer believe adult life is quite so harsh, but that attitude prepared me far better than my peers. I've spent a good amount of time talking down people ready to quit everything. Thankfully, I can reference some fantastic hopeful passages, and they have not failed such situations yet.