Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A good series gone bad

A wonderful series with outstanding military and historical foundation and detail, gone bad. The writer doesn't even seem to know his own characters anymore. The sex scenes seem like they were written by a 14 year old kid. When I began to get the distinct impression that the author had lost his way, I put the book down. As a historian, I'm disappointed that Whyte has chosen to sell out with this drivel.