Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Ambrose needs a good editor

It's interesting to read, but woefully repetitious in spots. Technically, Ambrose seems totally unfamiliar with his subject. I got the feeling he is neither a railroad buff nor mechanically inclined, for some of his descriptions of technical and mechanical aspects of the construction were pretty haphazard.In general, I enjoyed reading it, but I wasn't impressed by the quality of writing, and I'm not at all sure of the reliability of its information.