Each lecture page sometimes includes “recommended readings,” some (sometimes many, depending on the course in question) do not have them for that class; sometimes they’re linked in the powerpoint, but sometimes not.
Each lecture in each course covers enough that their could be/probably should be “recommended readings” links added for each, something relatively easy to do on a webpage “retrospectively.”
Still, on the “adding value,” for $100, in many cases $70, I think we get a lot of value for our coin (especially given that we get to pay in near-worthless Bernak$; – just wait till Tom starts charging us in gold-equivalents! Oh, wait; I shouldn’t give him any ideas. . .).