Do you mean festivals? Haven't heard of anyone doing a book fair in a long time. I didn't know they still did them. You'll have a better shot by googling. That way you can find out what events are being carried on in your neck of the woods. You can also check out your local libraries and bookstores. Libraries, especially usually have info on what's going on in the literary world, especially locally.
Stacey,
Thank You,
I'll have to check festivals out. Yes, I'm registered for several book fairs in my area. But, I'm looking towards a large scope of readers and am willing to travel.
Participation in book fairs is a great way of promoting a book, it is not only helpful to the newbie authors but established authors can also take a great advantage of various popular book fairs. You can always log into sites like http://www.combinedbook.com to have information about various book fairs.
My publisher is a member of ibpa and are able to get involved with some major conferences and venues. We also googled local festivals that coincided with our book genre.