Jericho's Fall by Stephen L. Carter

In an imposing house in the Colorado Rockies, Jericho Ainsley, former head of the Central Intelligence Agency and a Wall Street titan, lies dying. He summons to his beside Beck DeForde, the younger woman for whom he threw away his career years ago, miring them both in scandal. Beck believes she is visiting to say farewell. Instead, she is drawn into a battle over an explosive secret that foreign governments and powerful corporations alike want to wrest from Jericho before he dies.