Thornhill by Pam Smy
Thornhill is spooky and heart-breaking. Ella is sad and lonely, but when she glimpses a girl in the window of the Thornhill Institute, she becomes obsessed with finding out who she was and what happened to her. Mary lived at the Institute in the 1980s, also a sad, lonely girl who is bullied and terrorized by the other girls.
Thornhill is at heart a ghost story. We know from the beginning that Mary's a ghotst, but her diary entries made me cry. Her life at Thornhill was miserable, and few of the adults around her seemed competent or truly caring. Ella's story is just as sad. I assume her father loves her, but he's never home and her mom is gone, presumably dead. Her side of the story is depicted in black and white illustrations that are striking and add to the dark atmosphere of the novel. We know something happened to Mary, but not what.
I think this is one of...