Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great book

I found this book really good. It is very succinct and does not elaborate on emotions or even events. It depicts the New York teenage high society in a cruel and harsh light, which totally fits the mental state and experiences of the characters. It is a glimpse into a dark world which is often idealised by outsiders. It can only be more eye-opening that it was written by a 19 year-old.