Managers of the Barnes & Noble in White Marsh expect a throng when Hillary Clinton visits Monday to sign copies of her just-published book, "Living History," at the bookstore on The Avenue. Clinton, 55, left the White House in 2001, at the end of her husband's second term as president, and is now a senator from New York. Some speculate she will run for president in 2008. The Barnes & Noble visit will be Clinton's only stop in the Baltimore area during a promotional tour scheduled to last through mid-August, said a spokeswoman for Clinton's publisher, the Simon & Schuster...