Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Disappointed

I bought this book in high hopes, having heard nothing but great things about it, but I was supremely disappointed in it.The book moves slow -- so slow that by the half-way point, I decided to lay it down. For good.Probably wrong of me to write a review about a book I didn't finish, but I was stunned to see there were almost only positive reviews. Maybe this will help a few future buyers be more judicious in their decision and at least read the sample prior to purchasing.