It’s quite difficult to say much about this book without spoiling something, so I’ll make this short. The story takes place in a turn-of-the-century insane asylum, the narrator is unreliable, and all of the tropes of gothic literature are well in place all the way up to a mad woman in the attic. It reminded me of Crime and Punishment, the Brontë sisters, Charles Dickens, and Whuthering Heights, among many other pieces of classic literature - and in all the right ways.
And the blurbs on the back are right in saying no one is who they seem.