Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Formula Writing

I have been a Higgins fan for many years, and have read and collected almost all of the books he has written. Some were great and full of suspense. But the last three he has written, including this one, "Edge of Danger", are very disappointing. He has resorted to producing 2 books a year, based on the formula of a superficial story line with no depth, predictable characters, and it seems that he now writes just to capitalize on his prior reputation as a good suspense writer.Count the number of Marlboros smoked, the amount of Bushmills and champagne drank, (and in the midst he changes his champagne brand which makes one wonder whether he has received a better commission from one favorite to another), and you find a shallow book. I would save my money on this one, and buy it only if you collect Higgins First Editions, hoping to capitalize someday on the commercial side of selling all Higgins books to a collector.