@moonman people underestimate what's "age-appropriate" though. I think required reading should prepare high school students for the concept that the outside world is an unfair and often ugly place.
I was never given any reading restrictions at all and as a result i was reading at an adult level around 10 years old and had far outstripped "age appropriate" reading lists by the time i was 13. I had to get special permission to read books like "Lord of the Flies" and "A Tree Grows in Brooklyn" for book reports in school because these were considered "too advanced" for a 13-year-old mind. The real reason was prudishness; each had an extremely euphemistic scene that might be considered sexual in nature even though there was no sex, only hints. The scenes were more about violence, of which there was plenty in the "age-appropriate" books of the time.
In theory it's a nice idea, but in practice, the Karens of the world keep kids from reading perfectly acceptable books for the simple fact that they didn't like them.
Take, for instance, The Egypt Game; a supremely fucked-up book about kids larping about Ancient Egypt while hiding from a serial killer who eventually finds them. The only reason I can think of that The Egypt Game was allowed and Lord of the Flies was that The Egypt Game had a Newbery Medal of Honor and Lord of the Flies did not, being wriiten by an English author (although it did win a Pulitzer Prize). Parents were somehow convinced that every book on the Newbery Medal list was a good and wholesome book that one could give to their children without question, and certainly without going to the trouble of reading it oneself.
For comparison
https://en.wikipedia.org/wiki/The_Egypt_Game
https://en.wikipedia.org/wiki/Lord_of_the_Flies