In this New York Times bestselling investigation, Ted Koppel reveals that a major cyberattack on America's power grid is not only possible but likely, that it would be devastating, and that the United States is shockingly unprepared. Imagine a blackout lasting not days, but weeks or months. Tens of millions of people over several states are affected. For those without access to a generator, there is no running water, no sewage, no refrigeration or light. Food and medical supplies are dwindling