My dad (a veterinarian by trade) is really into medical history, so I was wondering if folks had any recommendations or favorites. I know he's done a lot of reading about the history of vaccines and the Spanish flu epidemic, but it's really not my area of interest, so I'm somewhat at a loss for how to find him something. Ideally it would be something available on audiobook because that's mostly how he consumes books these days.

Edit: Thanks everyone for the suggestions. I am not sure he has the wherewithal to do podcasts, but the book recommendations are great. I'm going with The Emperor of All Maladies and The Ghost Map, assuming he doesn't have them already.