Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Life Changing!

I bought this book, because I saw it recommended in a magazine. I thought the idea behind this book was pretty cool. Boy little did I know that it was about to change my life. Koren is so insightful. She is careful to not put blame on anyone, but just write her story. It was very refreshing to see someone my age writing about this "rite of life" young girls go through. This book is a must for any girl.