An airlinerâ€™s controlsÂ abruptly failÂ mid-flight over the Atlantic. An oil tanker runs aground in Japan when its navigational system suddenly stops dead. Hospitals everywhere have toÂ abandon their computer databases when patients die after being administered incorrect dosages of their medicine. In the Midwest, a nuclear power plant nearly becomes the next Chernobyl when its cooling systems malfunction.At first, these random computerÂ failures seem like unrelated events. But Jeff Aiken, aÂ former government analyst whoÂ quit in disgust after witnessing theÂ gross errors that led up to 9/11, thinks otherwise. Jeff fears a more serious attack targeting the United StatesÂ computer infrastructure is already under way. And as other menacing computer malfunctionsÂ pop upÂ around the world, some with deadly results, heÂ realizes that there isnâ€™t much time if he hopes toÂ prevent an international catastrophe.Written by aÂ global authority on cyber security, Zero Day presents a chilling â€śwhat ifâ€ť scenario that, in a world completely reliant on technology,Â is more than possible today---itâ€™s a cataclysmic disaster just waiting to happen.