I’m curious how he translates his storytelling approach in the audio medium compared to how he writes.

That is an interesting question Chris, the difference between his books and podcasts.

From my listening, he starts with a core idea and then makes it personal. (See my post on generous orthodoxy.) I think that this is something he does in his books, but they are often interlinked. Although the series relates to reviewing history, I feel each episode is pretty much standalone.