What’s a book that unsettled you? How did it do that?

How did it make you feel and do you still feel that way? For me it was 13 reasons why back in middle school. I remember the last couple of tapes striking a cord with me especially cause that was the first time I was introduced to what SA is. Looking back it pales in comparison to other things I’ve read but honestly it’s still one of my favorite books. So how about y’all?