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

I found this book to be very interesting and worthwhile.This book grabbed you and did not let go of you until the very end, and I was very upset because I couldn't put it down so I finished it very fast, I was happy though because I had the second one to read which is just as good.Basically the book switches from one place to another as four best friends go their own ways during their summer vacation, some experience happiness some experience sadness, all situations that are important in someone's life and very realistic.I definately suggest this book and the second one too.