There are over one hundred authors participating in this year's festival, including: mystery/thriller author David Baldacci; journalists Tom Brokaw and Cokie Roberts; historians David McCullough and Walter Isaacson; astronaut Buzz Aldrin; actress (and one of my favorite neighbors on Sesame Street) Sonia Monzano; novelists Meg Wolitzer and Jane Smiley; and illustrator Stephen Savage. While you can buy books to have authors sign, you are also welcomed to bring in any copies of books you already own to have those signed.
In addition to the author talks and signing sessions, there are tons of activities for families, as well as the Pavillion of States - highlighting books from each of the U.S. fifty states and U.S. territories.
To get a complete listing of authors as well as a schedule, you can go to the Library of Congress' Book Festival website. The Festival also has a app for mobile devices (both Apple & Android devices), which you can find at the Library of Congress App website. If you don't feel like coming downtown but want to catch some of the action, you can tune into C-Span (either on cable or on the web), who will be reporting live from the event.