Instruct: Classify a review into positive or negative sentiment.
Query: Disappointing

My expectations probably caused me to dislike this book more than any other reason. I expected to learn some things I didn't know. I didn't.I did not expect to be preached at. I was.Many of the author's criticisms of textbooks are valid ones, but his clear political agenda will probably prevent anyone's being persuaded who does not already agree with him.My own orientation is important here: I consider myself a moderate liberal; I am not the conservative he seems to despise.