Instruct: Classify Amazon reviews into positive or negative sentiment
Query: The rumor of a ghost writer will persist with this one!

I'm afraid the "Cat Who..." series is on a downhill slide. Although a quick read, this 25th title was flat & unmysterious. We know the villain practically from the get-go, and the story lacks the usual subtle clues building up to the ultimate solving of the crime. Come to think of it, there wasn't even much of a story! Major events like the fund-raiser are given short shrift, & important details such as Polly's leaving the library are glossed over. The characters, whom we know so well from the previous books, are one-dimensional. For that matter, where ARE they all? Chief Brodie barely makes an appearance, & then only as a bagpiper, and his classy daughter, Fran, has suddenly become a snobby lush we don't recognize. This can no longer be considered a mystery series which leads me to ask "Who wrote this book?"