Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Extremely interesting, but not "light reading"

I've really enjoyed this book - its extremely interesting and thought provoking and well written. However, it is also gets pretty in depth into evolutionary science and biology. I have enjoyed that quite a bit and learned an awful lot, but it is definitely not light reading as far as that goes. It is more scientific than I expected, which I actually like a great deal, but it is different from what I originally thought I was buying. This book is less of a "how to raise your child" type book and more of an "evolutionary and biological cross cultural study of infants and children and how different child rearing practices influence personality and culture". Which I found absolutely fascinating myself. I highly recommend the book - but with the caveat that you need time to sit down and concentrate on it, which is hard to do with small children around!