I read a lot of nonfiction and there's only maybe one or two main ideas that I'll remember from a book a few months later, so I certainly agree with the premise

I read a lot of nonfiction and there's only maybe one or two main ideas that I'll remember from a book a few months later, so I certainly agree with the premise of rereading, but there's just not enough time so I normally just reach for Littler Books or Blinkist whenever I need a refresher.