Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A very tough read

The author rambles on, jumping back and forth in time, between completely unrelated subjects. Just when it begins to get interesting, we jump back in time to some boring and irrelevant story of childhood, then when we come back, we are on a different story... ? It's good because it's about Feynman, but the writing is just terrible. I couldn't finish it.