A fellow author on the SCBWI-Illinois listserv asked if anyone had a list of book fairs or festivals for authors to attend and/or participate in. One reply included a link to a page on the site sellingbooks.com - Your guide to writing, publishing and marketing books and ebooks.
The author of the article, Scott Lorenz, explains why and how book fairs and festivals can be great promotional tools for authors. He also includes a list of the top 25 fairs and festivals.
While you're on the site, take a look around for other great information for authors!