I take extensive notes on everything I read to enforce active thinking and facilitate learning. My process is similar to The Feynman Technique, with additional linking and referencing between notes inspired by Niklas Luhmann's Zettelkasten method. The goal is to improve my understanding of the things I read while developing an interlinked wiki of everything I learn.
My notes can be found below – this not an exhaustive collection, only some of the notes taken since I began implementing this approach. Because of this, there may be some unresolved links to notes that I have not made public.