Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Haunting story, "real" characters

I read this book when it first came out and am still haunted by it. It's a very sad story that for much of the time keeps you on the proverbial edge of your seat. I'd never read anything by this author before, but if this very rich, very evocative style is her trademark, she will definitely be one to watch.