A family's secret, a ruthless fanatic, and a covert arm of the American government--all are linked by a single puzzling possibility:   What if everything we know about the discovery of America was a lie? What if that lie was designed to hide the secret of why Columbus sailed in 1492? And what if that 500-year-old secret could violently reshape the modern political world?   Pulitzer Prize-winning investigative journalist Tom Sagan has written hard-hitting articles from hot spots around the world. But when one of his stories from the Middle East is exposed as a fraud, his professional reputation crashes and burns. Now he lives in virtual exile--haunted by bad decisions and a shocking truth he can never prove:  that his downfall was a deliberate act of sabotage by an unknown enemy. But before Sagan can end his torment with the squeeze of a trigger, fate intervenes in the form of an enigmatic stranger.  This stranger forces Sagan to act--and his actions attract the attention of the Magellan Billet, a top-secret corps of the United States Justice Department that deals with America's most sensitive investigations. Sagan suddenly finds himself caught in an international incident, the repercussions of which will shudder not only Washington, D.C., but also Jerusalem. Coaxed into a deadly cat-and-mouse game, unsure who's friend and who's foe, Sagan is forced to Vienna, Prague, then finally into the Blue Mountains of Jamaica--where his survival hinges on his rewriting everything we know about Christopher Columbus.