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

I think it's a very good book and I found it very interesting. It's a different book than American Dream biographies flooding bookstores these days. It talks about Rockefeller's career as chairman of one of world's biggest banks and his business dealings with high profile world leaders. For an average Joe it may not be as interesting but it was very interesting book to me. I recommend this book to everyone who wants to get a glimpse of the life of rich upper class.