Instruct: Classify Amazon reviews into positive or negative sentiment
Query: HOT AIR

I was expecting substance or true crime, but this is a lot of hot air. The book cover says, "One of the most notorious murders of the 20th century...solved!" It says, "The true story." There is nothing solved in this book. Nowhere does the author, Steve Hodel, make any attempt to show concrete proof that the Black Dahlia case is solved. He shows us pictures supposedly of her and says his whole case is based on these pictures, which aren't even pictures of the Black Dahlia! Nor is this a "true story" of anything except Hodel giving us his opinions; no facts, no "true story", just hot air. I have to say I feel cheated.