Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great combination of thriller and science fiction

I loved this one-- it was, to me, the perfect combination of a thriller and a thought-provoking science fiction novel. The novel takes place in the research laboratories of the beginning days of nanotechnology (prefiguring the awesome nanotech of McCarthy's later novel BLOOM). There is some interesting speculation about the effects of longevity on society, and the effects of nanotechnology, but the science speculation is not overshadowed by the thriller plot and the realistic characterization. A definite rec if you like both thrillers and sf, as I do.