Instruct: Classify a given Amazon review as either positive or negative.
Query: Truly appaling

I have always been interested in forensics and behavioral psychology, so when I saw this book on the shelves I bought it immediately. I have never been so disgusted with a book in my life. Both Cornwell's writing and her "evidence" are just embarrassing. All this book proves is that her ego has far surpassed her talent. The majority of her "evidence" consists of: "There's no reason to suspect he wasn't in London that night," or "he might possibly have walked home this way." Her so-called forensic evidence (DNA and handwriting) are inconclusive and less than convincing. The entire book is nothing more than any of her other books: fiction. I'm embarrassed to even own it. Try John Douglas's nonfiction instead if you want real criminal science.