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 is found decapitated, the data missing.
High resolution NASA images reveal an unnatural feature hidden in the depths of a crater on Mars... and it appears to have been activated.
Sixty hours and counting.

DOUGLAS PRESTON has published forty books of both nonfiction and fiction, of which thirty one have been New York Times bestsellers, a half-dozen reaching the #1 position. He is the co-author, with Lincoln Child, of the Pendergast series of thrillers. He also writes nonfiction pieces for the New Yorker Magazine. He worked as an editor at the American Museum of Natural History in New York and taught nonfiction writing at Princeton University. He is president emeritus of the Authors Guild and serves on the Advisory Board of the School for Advanced Research in Santa Fe.