Oh yes I read To Kill a Mockingbird recently - liked it very much, and also the recent one/prequel to it - Go set a watchman. Not remotely unsuitable for a teenager (unlike Room, which I do see your point with) though I wonder whether Go set a watchman is a book I appreciated more at my age than I might have done as a teen - it's very much about looking back at your younger life with an adult's head on.
Well, I've now got 6 days away from GCSE revision - DSD and DS have both gone off to spend a few days with their other parents (ie my ex, and DH's ex respectively) DS has insisted on being picked up by car so that he can take his computer to his dad's so that he can study, which I guess is a good thing. Bit of a hassle disassembling a PC, but he's done it before for gaming purposes, and seems happy to do it. I've tried to brief my ex on what study he needs to do, but relying mainly on DS to be on top of it himself for the next week I think. I'm off away for work from Wednesday, but DH is away at the moment, so just me and eldest DSD in the house today and tomorrow, which feels very quiet and calm. She has uni exams coming up but is the sort of child who never needs any prompting to study or organise her life. I think we're only now realising how lucky we've been with her - others are not proving so easy!