Effective Notetaking by Fiona McPherson
I am currently reading Effective Notetaking by Fiona McPherson. It is by far the best book I ever read on this topic. It is basically a book on how to process text into note.
In my opinion, it is best to be read as a comprehensive "how to pre-process a text before you incorporate your notes into your Zettelkasten" (if you are a Zettler).
I am a Zettler