As the book business struggles to adjust to the digital age, some publishers are testing multimedia books and Web sites for popular authors. St. Martin's just released the multimedia book "Personal Effects: Dark Art" by JC Hutchins and a multimedia site for Alyson Noel's hit young adult series "The Immortals." Penguin and Simon & Schuster are also testing new media efforts and in this week's New Media Minute you'll learn what's working and you'll get a chance to win my copy of "Personal Effects." Less