Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Great resource!

I love this book! It is a great resource for any pregnant couple or birthing professional. I purchased it for my doula training and am learning a lot from it. My only complaint is that my copy is a bit out dated: 1994! After the brief review of the history of birth in the U.S (which is very interesting!) they predict how trend will continue and change. They expect c-section rates to go down when I think they have actually gone up. I'd love to see their thoughts on how things are now. It was also written before the trend of "hypnobirthing" and possibly some newer drugs and techniques in birth. But over all I think it is an amazing book!