When it comes to an eBook reader, the choices are limited. The market is dominated by Amazon’s proprietary Kindle along with a few other options like Kobo, Nook and Onyx.
An interesting news for open source enthusiasts is that a developer, Joey Castillo, is working on creating an open
IIRC it only suports plain text files / Markdown rn. Not supporting EPUB is a non-starter for me. I use my Kobo right now and love it. If they add EPUB support i will heavily consider building one.
The creator is working on an epub-to-text-file converter here:
https://github.com/joeycastillo/libros-convert
I’m not sure I understand, epub is both the industry standard and an open format, as far as I know. Why not work on using it or build it around epub from the get-go?
I have to admit I’ll have to wait for the project to start implementing epub to consider getting on board, but it’s still a great effort.