Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Thin on credibility

McEwan has written some good books - but unfortunately this is not one of them.The plot is somewhat overblown and pretentious, and the book itself is so brief that there isn't enough substance to enable a suspension of disbelief. In fact this feels like a fleshed-out sketch for a book that the author couldn't be bothered to write properly. I couldn't believe the praise it received compared to much better books of his. A big disappointment.I was a fan, but after reading this poor effort it was some time before I was able to read another of his books.