I love all things book related so of course I listen to book themed podcasts also. When I'm not in the mood to listen to an audiobook, I check out bookish podcasts during my drive to and from work. Not only are these podcasts fun and entertaining, they're also an awesome way to get introduced to new authors, genres, and are reliable sources into world of books, ebooks, and audiobooks..
I use Stitcher on my Google Android smartphone for my podcast listening, but these should be available almost everywhere. including the Apple iTunes store. I believe there are several podcast aggregator apps out there, but I personally find Stitcher very user friendly.
Happy Reading & Listening,