I think it's this one
https://wikistr.com/nkbip-01*fd208ee8c8f283780a9552896e4823cc9dc6bfd442063889577106940fd927c1
We publish the books with Alexandria or Scriptorium, but there are other clients that can create them. I was just using Nostrudel event publisher and NAK, at the beginning, but that's more fiddly.
The books are actually on lots of relays, like Damus. They're just normal-sized events.
Here is the book "Dracula" on three different clients.
We did it the other way around, to the other "book" clients: we store the books, themselves, as events on relays, and you can export them from there to PDF, HTML, EPUB, or Asciidoc.
The export function is on the Wikistr client. It's cool because you can download books from relays to your PC or e-reader or whatever.
Here is that Jane Eyre on my Kindle mobile app and my e-paper reader:



With relay.tools, you don't even need to download, as it reads straight from the relays.
That's why I encourage people install Citrine, as it's a great local storage for their publications. Then they can read them offline.
yes and relaytools-android keeps all loaded event in memory, so if you task switch without killing it, well, it's like a big in-memory cache. profiles and relay lists are cached to disk, the rest is per relay on switch or resume.
Yeah, it's listed on the NIP repo ReadMe.md, but it's called "Publications", rather than "Books". We also use it for academic journals, blogs, etc. Or collections of books, like the Bible. We published the entire Bible on Nostr with it.
I'm currently editing the Quran, but only in English. Someone else will have to do the Arabic, as I can't read it.