Instruct: Classify an Amazon review into positive or negative sentiment.
Query: A Major Disappointment

I have read all of Martha Grimes books, and will not be buying the next one. The plot wanders, the characters are one dimensional, the humour is missing, and I felt extremely angry at the ending because I felt cheated. I felt it was unfinished and was going to complain to the publisher. Perhaps this is a device of Martha Grimes to entice me to continue to buy her books. It is sad that she has to stoop to this, and her trick has had the opposite effect.Don't buy it, or the next one. Buy P.D.James, Ruth Rendell , Anne Perry and Stephanie Barron instead for satisfaction.