I recently started writing reviews of each book I read. I found it helps me retain the contents of the book and often people give positive feedback about what they learned from my review.
I did this for a few months in 2017 but it was taking like 90 minutes per chapter, and at full saturday morning 8am attention! It's like doing math homework. And math homework is not the most important thing I can spend the best 90 minutes of my day on.
https://ahalbert.com/reviews/2023/06/04/the_culture_map.html
I took some inspiration from the book review contests of "Astral Codex Ten"
https://astralcodexten.substack.com/p/your-book-review-publi...