This is what I use evernote for. I create notes about chapters in my own words, and it's fun to go back and revisit them. I found this was the only way for me

This is what I use evernote for. I create notes about chapters in my own words, and it's fun to go back and revisit them. I found this was the only way for me to absorb any juice from these books. And for technical books, I use sticker arrow markers that point to the specific parts on the pages, and this makes it easier to just flip pages and jump to sections.