I listen to QuackCast by Mark Crislip which I find really interesting, I also listen to his Puscast and much of that is over my head, but since there are only a couple of episodes a month, so why not? Anyway he wrote a book Puswhisperer: A Year in the Life of an Infectious Doc that went on sale on Kindle for $1, so I figured what the hell, I'll try it. It's well written, witty, and interesting. I recommend it!