PAUL KRUGMAN, the liberal economist and columnist for The New York Times Op-Ed Page, has recently urged his fellow liberals to be less civil toward their conservative foes. The British publisher of his latest book, "The Great Unraveling," however, may have taken Mr. Krugman's advice further than he intended. Unlike the relatively staid cover of the American edition published by W. W. Norton, the British book jacket bears caricatures of President Bush as Frankenstein-like and Vice President Dick Cheney with a Hitler mustache. A dark scrawl on the vice president's forehead reads, "Got Oil?" Christine Iverson, a spokeswoman for the...