For me, there's three.
Watership Down
Prisoner of Mao 😳
Chief!
The second one is the story of life and death in Mao Zong Ding Dong's forced labor camps.
Chief is the autobiography of Chief Albert Seedman's tour of duty as New York's Chief of Detectives.
I read the Exorcist at 10. I read the Rise and Fall of Adolf Hitler at 8.
I read a lot of books when I was a kid, many of which were adult ones. Was I too young for them? That I couldn't say. None of them ever gave me nightmares or left me traumatised.
American Psycho when I was 7. Just kidding, I read it senior year of high school when it came out.
The "Gor" books by John Norman. Weird b&d fetish stuff, as a kid I was looking for more Conan-type adventures.
I read Judy Blume's "Are You There God? It's Me, Margaret" when I was in fourth or fifth grade. I had no idea that it was supposed to be a "girl's book," I just happened to like Judy Blume's stuff. It was, shall we say, an eye opening read for me.
I remember some girls in my class were absolutely horrified when they saw me reading it, as if it were some sort of top secret text that I shouldn't have been allowed to possess.
At least I got some privileged info out of it. :bouncegiggle: