I'm suprised that no one's mentioned this yet, but I've found that even for linear prose-text, my recall of what I've read is much better with paper books than

I'm suprised that no one's mentioned this yet, but I've found that even for linear prose-text, my recall of what I've read is much better with paper books than with ebooks. My working hypothesis for why this is true is that it's easily the mentally differentiate the paper books I've read: when I try to remember a book, often the first thing that comes up in my mind is the cover art. My mental records of paper books are indexed by a multitude of factors---what the cover looked like, what the paper felt like, approximate size, typeface, etc.---that just aren't there for ebooks