Go to Search, click on Audio, under Artist name key in author's name, click More Search Options box, under Type (pull-down menu) click on Audio Books.

Then do your Search (hit Search button).

I'm been using Limewire for a couple of years now and it just dawned on me that maybe there are audio books out there. Wow. There certainly are a lot of them. You will learn more search tips as you progress. Now I can't stop!

Happy listening!