One of the podcasts that I've started listening to more recently is the 99% Invisible podcast (from National Public Radio, of course). 99% Invisible is "a tiny radio show about design, architecture & the 99% invisible activity that shapes our world." In the past, the show has featured the sounds that your cell phone makes, the best beer in the world, and the design of the US dollar bill.
The most recent episode is one that I think would interest book lovers, so I am sharing it below. It is about the surprising path of inspiration and just how much of our new, fresh ideas we owe to people who paved the way before us.