This is a frightening book. It describes an unexpected form of warfare in which the United States is already behind China, Russia, and possibly terrorists. And worse for us, we have already lost initial battles. Richard Clarke is a former Assistant Secretary of State and a Washington insider, having served Presidents Reagan, George H.W. Bush, Clinton, and George W. Bush. He made headlines with his charges against the Bush-Cheney administration on getting this nation into a needless war in Iraq, and events proved him correct. Now, he and Robert Knake tell how our wonderfully-efficient, computerized systems that control our electric grids, transportation systems, defense against military attack, and much of our day-to-day life are open to attack, control, and destruction by hackers, terrorists, or enemy agents working to disable us before a massive attack by a foreign power. His call for rapid and powerful action to set up defenses is right on the money.