I put together and self-published a book not too long ago: https://www.kontext.store/product/a-stoic-resurrection/

The PDF is available for free (Creative Commons license) and I can make you a bulk deal or a dropshipping deal for selling the physical book on your site if you're interested :)

nostr DM's are iffy so feel free to shoot me an email: kontext@satosh.ee 🤠