Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Don't waste your money.

Okay, I really did try to read one of these books once, but that didn't last very long. I honestly don't understand why people even like them. There's nothing good about these books. They're just about materialistic people and their boring, superficial lives. Seems to be that all they do is drink, have sex, and backstab their "friends". How wonderful. Don't waste your money.