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

I simply did not enjoy this book. That's not to say I got nothing out of it, because the information is there. But halfway through the book, I briefly considered putting it down and moving on to something else. It's just not written in a way that is reader friendly. It reads like something written by a historian, not a writer. The best books are written by those who wear both hats.