Your A4 summary page technique is ingenious. It forces one to focus on the absolute essentials gleaned while reading a book rather than fluff which is actually

Your A4 summary page technique is ingenious. It forces one to focus on the absolute essentials gleaned while reading a book rather than fluff which is actually an art in "Note-taking". It is the same as "Precis Writing" but for a book. In case you didn't already know, you might find the following useful; 1) SQ3R - https://en.wikipedia.org/wiki/SQ3R https://en.wikipedia.org/wiki/SQ3R 2) Cornell Note-taking method - https://en.wikipedia.org/wiki/Cornell_Notes https://en.wikipedia.org/wiki/Cornell_Notes