In my personal experience, I have always found it that the books I've listened are the first to fade from my memory. Second came books consumed as ebooks and last, old fashioned paper books. I believe that the act of touching the book, carrying with you everywhere, leaving it on the table, seems to make its content much more memorable for me than reading it as an ebook or listening to it. I find it that I still remem…
There is evidence that we build a mental map of the story based on a book's physical characteristics. Then we can pinpoint some events in the storyline because we know more or less the physical location on those events in the book (the object). Eg: when we read the book, turning pages, we build the storyline in our head but also a map based on the physical path of the pages.