Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A product of its time

I bought this at a second hand book shop for 1 ($2), I would not want to spend much more than that.The book suffers from two major problems; the date of publication and the author's journalistic style.Regarding the former, the book was published a few years before the collapse of the Soviet Union and now that the archives have been opened (to an extent), some of the chapters are inaccurate.The latter problem is the author's style. Oberg is a journalist and this is no academic text. The book has no referencing whatsoever, no foot noes, no bibliography and even no index - we simply do not know where Oberg got his information. Oberg also has a tendency to write in a hyperbolic fashion that seems more at home in a tabloid newspaper.These two problems combined mean we get a lot of speculation, guess work and unnamed 'sources'. Oberg simply doesn't know what happened in a lot of cases.