If you find it obscene then make a book that queer youths can relate to that can replace it. As it currently stands if that book is the only thing that some queer youths can find commonality in then it is a good book to have for their mental health.
If they’re so desperate, they can read it on their own. School libraries don’t hold a monopoly on book distribution
I really wish I could grab your eyes and make you look at the state of children.
I have a brother inlaw who is used to be in the FBI a few years ago, who found out he was Asexual. Before that realization it put a huge strain on his marriage.
There is no way to learn about something that you have no idea even exists. If they will fire you for talking about the possibility of liking the same sex, then someone can suggest the book instead of becoming at risk of getting fired. Once again, getting fired for saying that anything but hetero exists at all is bad, and this gives a way to “talk” about it.