From the Number One international bestselling author of Jurassic Park comes this classic Crichton page-turner, weaving together heart-pounding thrills with cutting-edge technology.

Deep in the Nevada desert, the Xymos Corporation has built a state-of-the-art fabrication plant, surrounded by nothing but cactus and coyotes for miles and miles. Inside, eight people are trapped -- because outside, waiting for them, looking for them, is a predatory swarm of micro-particles that they themselves created. The swarm is getting bigger and more powerful by the hour, and they must find a way to stop it before it gets inside -- unless it's already too late...

Once again, Michael Crichton combines up-to-the-minute science with relentless pacing to create an electrifying techno-thriller.