Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Disappointing....not much substance

I ORDERED THIS BOOK OFF OF AN ANONYMOUS EMAIL I RECEIVED. NOT SORRY THAT I DID, BUT NOT IMPRESSED EITHER. FOR A BOOK THAT WAS SUPPOSED TO BE CONTROVERSIAL, I DIDN'T FIND IT THAT MUCH SO. SOME DECENT SEX SCENES, BUT OTHERWISE VERY BLAND.