In Douglas Preston's Impact, Wyman Ford is tapped for a secret expedition to Cambodia... to locate the source of strangely beautiful gemstones that do not appear to be of this world. A brilliant meteor lights up the Maine coast... and two young women borrow a boat and set out for a distant island to find the impact crater. A scientist at the National Propulsion Facility discovers an inexplicable source of gamma rays in the outer Solar System. He...