Great story.
Technogeeks will love it. It gets a little deep into the weeds of tech sometimes but even non techies should like the story.
Great introduction to understanding the bill of rights in the US and how fear facilitates the erosion of freedom.
A little bit of teenage physical intimacy which probably eliminates this from being used in schools. There is sexual intercourse although it's not described in detail.
There are descriptions of torture and psychological abuse but nothing worse than what they've read in the news or heard on the radio or seen in movies. It's an unfortunate reflection of the real world.
Older high school kids will like this book and the writing is appropriate for them if you don't have any hang-ups about kids reading about sex.