I'm sure someone's mentioned these books before, but I wanted to bring up "Pictures at a Revolution" and "Five Came Back" by Mark Harris in relation to the wrap-up portion of the episode.  Trey was talking about motion pictures in relation to WWII and how within a year there were movie made OF the battles, and Brian brought up the idea of propaganda.  "Five Came Back" is directly related to that subject in that it follows five major directors who ended up within the propaganda machine that was the US government, and discusses how that infrastructure was put into place, as well as how it was challenged and evolved over the course of WWII.  It's pretty tightly focused on the directors' experiences (John Ford, William Wyler, George Stevens, Frank Capra, and John Houston) and illustrating it through their documentation and perspectives, but it feels really in depth and is meticulously cited.

The other book, "Pictures at a Revolution" is more tangentially related to the conversation, but it definitely explores some of the theme that was being discussed about the demarcation between 70's-style movies and the earlier studio-produced films.

Anyway, they're both solid reads (I know "Pictures at a Revolution" is available in audiobook) and I was really amused at how tightly they related to the wrap-up conversation.