Update on Sep 30 2023: I (Debbie Reese) no longer recommend Bruchac's work. For details see Is Joseph Bruchac truly Abenaki?
Last year, two Native writers were there: Cynthia Leitich Smith, and N. Scott Momaday. View the webcast of her talk here and his here.
Note (Sept. 12, 2008):
I neglected to say that the National Book Festival takes place in Washington DC at the National Mall. Here's a link to the homepage for the festival.
Also! there's a "toolkit" for each author. Bruchac's materials include an interview that starts out with this question: "What sparked your imagination for your newest book, March Toward the Thunder?" Click here to get to that page.