When I come back to the former book I go through the chapter again creating Anki cards for anything notable. The sheer amount of material I notice I had completely forgotten on the second reading is astounding.
I go through the Anki cards daily, in the morning I cover the material created from two of my books. In the evening I go through the third book (which I deem more valuable in a deep sense/abstract).
I have yet to have solid a strategy on chunk-building (as the course pushes you to do), however I can still see some bigger units emerge with time.