Dick Cheney may be a taciturn man, writes author Stephen F. Hayes, but the vice president can become animated discussing doomsday scenarios. In his new biography, "Cheney: The Untold Story of America's Most Powerful and Controversial Vice President" (578 pages. HarperCollins. $27.95), Hayes tells the story of the Cheney family, sitting around their new big-screen TV in Jackson Hole, Wyo., on a recent Fourth of July, watching the 1997 movie "The Peacemaker." Starring George Clooney and Nicole Kidman, the film is about a plot to blow up New York with a nuclear bomb. Partway through the movie, Cheney's wife, Lynne, entered the room and asked what was happening. The question was directed at no one in particular, but the vice president launched into "a 10-minute, scene-by-scene synopsis of the action," according to Lynne's brother Mark Vincent. She interrupted to clarify her question: "What's happening now?"

Cheney, writes Hayes, woke up on the morning of September 12, 2001, asking: when is the next attack? A lot of Americans woke up that day asking the same question, but while many have been lulled back into semicomplacency, Cheney has never stopped worrying and wondering and—it must be said—trying to do something about it. The vice president has become a kind of modern-day prophet of doom. He is seen by many Americans as slightly creepy, if not sinister. Of course, he could be right: Al Qaeda may well be, as recent intelligence reports suggest, gearing up for another and possibly more catastrophic attack. But what makes Cheney so dire, so animated by gloom?

You won't find a psychological explanation in Hayes's new book. A writer for the conservative Weekly Standard, Hayes is largely uncritical and essentially buys into the picture of Cheney-as-Stoic, a throwback to an ancient Greek warrior who can see the Fates gathering but grimly and bravely soldiers on.