Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Serviceable, not his best

Graham Hancock talents are his engaging writing style and his detective skills. His previous works are all marked by a truly arduous hunt for clues, a thorough and cautious analysis('onion' theory notwithstanding), and ultimately a very convincing and original case.Unfortunately, Graham's detective skills are largely wasted on a subject that is so many million miles away. In this book, Graham has no more raw data available to him, than any other writer on the subject; while some of his 'reinterpretations' of the evidence are thought-provoking, their just isn't enough of it to sustain the book. I'm not saying it wasn't interesting, Graham's writing talents alone ensure that; but all in all, I would wait to find it at a used book store.