"Geiger has a gift: he knows a lie the instant he hears it. And in his business--called "information retrieval" by its practitioners--that gift is invaluable, because truth is the hottest thing on the market. Geiger's clients count on him to extract the truth from even the most reluctant subjects. Unlike most of his competitors, Geiger rarely sheds blood, but he does use a variety of techniques--some physical, many psychological--to push his subjects...