I just read a summary in Wiki. If that description is accurate, it is a relatively short first person narrative of a man with a seemingly sociopathic personality who helps a friend who beats his (the friend's) girlfriend with no remorse about how the beating affects the woman. Later, the woman's brother attacks his friend and when the hero meets the brother, he shoots the brother multiple times even though the first shot kills him. Then he goes to prison and is executed, still feeling misunderstood.
I think that there are better things for high school librarians to promote. Think of the shelf space. You would have to throw out two or three copies of that book to make room for one copy of Atlas Shrugged, a far more instructive book for high schoolers.