What do you mean by "converting files into a separate app"? What weird context am I missing here?
Discussion
The average Kindle user just uses books on their kind. They don't download epub files and import them to a third party app or convert them from one file format to another to consume them.
OK, but what does have to do with anything? Is nostr:npub1m4ny6hjqzepn4rxknuq94c2gpqzr29ufkkw7ttcxyak7v43n6vvsajc2jl proposing a way to publish books on Nostr that is compatible with Kindle?
Not compatible, comparable or an alternative to Kindle. If it's done as a low barrier to entry e-reader website, then people could use it as an alternative to their Kindle. They would not have to download epub files and import them into a separate e-reader application. They just visit the site and that's it. Easy reading.
Yes, an e-reader friendly Nostr site for books and anything else in long-form.
All e-readers have a browser.
Also ideal for tablets or for people (like me) with bad Internet connections or crappy hardware.
If you look on Project Gutenberg, they have all of the different filetypes already created and stored, probably with a database.
Nostr already has a database, tho (relays, an event store), where we're storing the books as events, which are the smallest, simplest building blocks of such documents. So we can always work parts-to-whole and generate any other view on the fly, including HTML. With a book, you don't need the speed and convenience of a websocket, as the text hardly changes and there's hardly any interaction. It's just you, staring at a long text, occasionally highlighting something interesting, and maybe submitting a review of the book, at the end (like we do for relays).