Just found a treasure trove I'm loving.
BBC World Service - World Book Club. I assume, since it's World Service, it's available everywhere. I hope so.
There are 118 episodes available, each under half an hour. The presenter, Harriet Gilbert, introduces the book and author, and hosts a discussion of the book in which people from around the world ask the author questions. So far I've listened to 8 episodes, with authors as varied as Umberto Eco, Philip Pullman, Kazuo Ishiguro, Arundhati Roy, and Ruth Rendell.
You don't have to have read the book - I've read some, not others. I find it fascinating hearing authors reading bits from their books and answering questions varying from how they got their ideas, how they see certain characters, and how they go about writing.
Edit: I've just discovered that the first 5 I listened to were 26 minutes each. The rest seem to be 55 minutes. Good - they will last longer. By the time I get to the end of all of them, I will have forgotten the first ones and be able to start again!