Probe — Edward M. Lerner

Is this the greatest discovery of all time … or the biggest hoax?
Bob Hanson, the chief scientist of a major aerospace corporation, has made an incredible discovery: a wrecked alien spacecraft adrift in the Asteroid Belt. The evidence is compelling -- video images from the Prospector space probe he himself had created. The military enthusiastically embraces an investigation of the extraterrestrials, remarkably indifferent to the inconsistencies that begin to appear.
Undeterred, Hanson keeps digging … and finds much more than he had ever bargained for. Soon on the lam, he, and everyone to whom he turns, is hunted. Before long only one conclusion remains unassailable -- that his mysterious opponents play for keeps.
Are aliens manipulating events on Earth? Did unscrupulous corporate executives invent the aliens in search of giga-buck government contracts? Has the Pentagon fabricated an alien menace for its own purposes?
Or is the truth something really unimaginable?