Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A Tour de Force! La Piece de Resistance! Incredible

Oh, Duncan, youre book speaks volumes about the inner butey of youre soul. It's like a pristine window into the center of youre ever-deepening mind's eye. Every time I open this masterpeace, the cup of my soul is refilled from the bountiful reservoir of youre knowleje. You and your incredible understanding of the inner-workings of my eternal being will never cease to amaze me. I can't begin to express these feelings in words, let alone vocal thoughts.