From the blockbuster, "New York Times" bestselling author comes a high-concept, high-octane thriller at the crossroads of presidential politics and cutting-edge medicine. . . .Gabe Singleton and Andrew Stoddard were roommates at the Naval Academy in Annapolis years ago. Today, Gabe is a country doctor and his friend Andrew has gone from war hero to governor to President of the United States. One day, while the United States is embroiled in a bitter...