Stephanie Thornton’s AMERICAN PRINCESS, the sweeping tale of Theodore Roosevelt’s daughter Alice, a keen wit and bright political mind whose wild antics in the White House made her America’s first media sensation in her youth, and who later became a political force to be reckoned as the wife of a debonair congressman and the mistress to a powerful senator, to Kate Seaver at Berkley, in a good deal, in a pre-empt, in a two-book deal.