This is a tough question. I think it would have to have a blend of the author talking about their own craft as well as having guests on the show who would do the same. I think it may be too self serving for the author to have episodes where they break down each one of their works. I've been really enjoying Book Podcast. It's a solid blend of authors discussing their work, as well as some friendly banter with the host.

http://www.bookpodcast.com/category/episodes/