I have (had) 18 reviews for my book on the Amazon site. Most 4 and 5 star with 3 3 star and 2 2 star. I noticed recently that one of the 2 star reviews has disappeared. It wasn't a nasty review, it was clearly a case that the reader did not enjoy my book. I'm ok with that. So, since I had no problem with it, how does one lose a review? Could the reviewer have removed it? Just curious.