If it really takes 5-10x as long, it might be more efficient to reread books you decide are worth remembering. Reading the whole book 5 times (with months in be

If it really takes 5-10x as long, it might be more efficient to reread books you decide are worth remembering. Reading the whole book 5 times (with months in between, of course) seems like it would be more effective at helping you remember the book itself, rather than your summaries and statistics from a single reading. You might not remember all of your takeaways from your first reading with this method, but you should be able to make new observations and connections each time you reread it, which you have a 0% chance of remembering with your current method.