In the Nevada desert, an experiment has gone horribly wrong. A cloud of nanoparticles--micro-robots--has escaped from the laboratory. This cloud is self-sustaining and self-reproducing. It is intelligent and learns from experience. For all practical purposes, it is alive. It has been programmed as a predator. It is evolving swiftly, becoming more deadly with each passing hour. Every attempt to destroy it has failed. And we are the prey.

While in Las Vegas, Jessy Sparhawk, desperate for money, places a bet that changes her life forever when, after collecting her winnings, she is drawn into a murder investigation involving a gorgeous PI, an angry ghost, a casino magnate, and a ghost town called Indigo.

Embarking on a guided rafting trip with her husband, Paul, in Big Bend National Park on the Texas-Mexico border, Anna Pigeon is drawn into dangerous intrigue when one of their companions on the trip discovers a pregnant woman caught among tangled branches in the river.

The United States government is given a warning by the preeminent biophysicists in the country: current sterilization procedures applied to returning space probes may be inadequate to guarantee uncontaminated re-entry to the atmosphere. Two years later, seventeen satellites are sent into the outer fringes of space to "collect organisms and dust for study." One of them falls to earth, landing in a desolate area of Arizona. Twelve miles from the landing...

Macon Fallon had never needed more than a deck of cards, a fast horse, and a ready gun; he was counting on those things now as he led an unsuspecting group of settlers to an abandoned mining town. But while Fallon prepared to pass the ghost town off as a gold mine in the making, a funny thing happened: a real-life community started to take shape in the town he'd christened Red Horse. So when a band of vicious outlaws and a kid who fancied himself...