Hmmm, I guess I just find it strange for the public school system to advocate literature which entails graphic adult sequences (and indeed has no problem doing so) but has immense difficulty with films which demonstrate the same thing visually...
Besides the extraordinary Shakespearean plays, the following books have been required reading for me in middle and high school.
Oedipus Rex Three suicides, self mutilation.
Antigone A number of suicides, mention of rape.
The Sound and the Fury Forbidden sex, contemplation of incest
All the King's Men Filled with adult language, somewhat graphic sex scene
The Iliad Mention and advocacy of homosexual relationship, graphic violence depicted
The Catcher in the Rye I can't remember what all was in this book, but adult language I think is a given.
The Garden of Innocence No, it has nothing to do with innocence.
The Great Gatsby Some depiction of sex, adult language
Metamorphoses Some of the most erotic poetry ever written in the classical age
Without going completely into Shakespeare, but here's a short list.
Julius Caesar Depiction of violence, a number of suicides.
Romeo and Juliet
Hamlet Sexual agression towards women, including one's mother. Violence, a number of suicides.
Twelfth Night Crossdressing, sexual frustration with homoerotic edge.
Macbeth Witchcraft, murder, rather strong language considering when it was written