Impact

Douglas Preston, the bestselling author of "Blasphemy" and the coauthor of the acclaimed Pendergast series, returns with "Impact," a gripping novel of out-of-this-world intrigue. Wyman Ford is sent on a secret expedition to Cambodia, where he is to find the source of recently-discovered gemstones that do not appear to be of this world. Meanwhile, a meteor lights up the Maine sky, and two young women set out in a boat to find the impact crater. A scientist at the National Propulsion Facility is found decapitated after uncovering an inexplicable source of gamma rays in the outer solar system. And NASA imagery reveals a bomb in a crater on Mars - recently activated. Ford has only sixty hours to act.