Every time I read a thriller, I remember why I don't read thrillers.
Do I really need a reminder that humans are capable of the worst things? I'm not sure. What I know is that the premisse of this book intrigued me because it's set in an American boarding school and centers around the creative writing teacher. Well, Ms Witt applied as literature teacher, but her classes were switched just before the first day of school, so she has to manage. When she asks the student for an anonymous portrait in 4 simple questions, she's not expecting to dig out the school's darkest secret.
I don't know if it's my asexuality speaking, but I found it super annoying that all characters thought constantly about was sex. I know consent is one of the central themes of the book, but that wasn't clear on the back cover. I did finish it because it was quick, and I enjoyed the feminist uprising taking place, but I won't be reading this again. And I'll stay away from thrillers for a while. 
As a side note, I'm not sure having one character with an Asian name be the best student is particularly welcome. Especially when there's zero diversity in the cast. 
Rep: one gay character.