I was reading “The Third Policeman” last night. Several pages happened to have large footnotes that took up half the page. So what I would do is read two pages of actual story text and then go back and read the footnotes which in themselves had a short story.
This peculiar setup gave me an idea of having a book be printed containing two stories side by side on every page. Say like for example, having two main characters and their counterpart struggles to reach some goal, splitting each page in half (horizontally). I think that would be a rather cool read.