I've been doing this thing recently where I'll make a list of the chapters in the book and every time I finish a chapter I'll write a small summary and even highlight it a color that feels appropriate if I feel it would help me remember it better. I'll show you what I mean.
https://app.gemoo.com/share/image-annotation/588238791721803776?codeId=M0GjoRpKApJBa&origin=imageurlgenerator&card=588238789981167616
This series had 5 books so after every chapter I tried to summarize it as succinctly as I could.
What I noticed is that this helped me memorize so much more than I usually do about a book. Because I'm always coming back to the list as I progress thru the book, I spend more time looking at how the story is structured, how the pacing has been, and where I think the story might go next.
Plus if I ever in the future forget details, I'm sure looking over this will quickly refresh me.
Do you take any notes? It's obviously not necessary, but it seems to help.
Not notes, but I bookmark any passage I like. Later I photocopy and cut out the excerpt to paste in a notebook. I scrapbook all my favourite passages.
I’ve never thought of doing this, but I like it. Sometimes I stop reading and absorb just how well written or clever a passage was.