Badwater

DEATH VALLEY EARNS ITS NAME when a terrorist threatens to unleash lethal radioactive toxins -- in America's most fragile national park. Forensic geologists Cassie Oldfield and Walter Shaws embark on a perilous mission to find and stop the terrorist. But this hunt pushes them to their limits. The summer desert is brutal. The material they seek is hotter than the desert in August--and they are each particularly vulnerable to its effects. As the hunt turns dangerous, Cassie and Walter learn that they are up against more than pure human malice. The unstable atom--in the hands of an unstable man--is governed by Murphy's Law. Whatever can go wrong, will go wrong. And it does. ► All books in the series are complete novels, and can be enjoyed in any order.