why turn books into markdown when theres formats dedicated to render books already?
storying books as nip-23 events doesnt seem very pratical, especially books with images, charts, footnotes/citations something that book formats handle really well
using comics as an example of reading material that couldnt work as markdown, a nostr reading app could look something like tachiyomi/mihon (a comic/manga reader) where instead of connecting to directories of hosted sources it'd just be a list of npubs reading off notes pointing where the content is hosted instead π€
