Paul Krugman's book, The Great Unraveling, hits bookstores today. Are you surprised that Krugman's publisher, W.W. Norton, has repeatedly refused my requests for a review copy of the book? Despite this inexplicable omission, America's most dangerous liberal pundit is in full book-promo mode. He's dropped his teaching duties at Princeton for the quarter. His personal website lists 14 speaking engagements around the country, with more to come (a helpful reader suggested that coconut cream pie works best for such occasions). And the inevitable media interviews are already starting, kicking off with a whole hour this past Saturday with Tim Russert...