on which e-readers (like Kindle or Kobo) work best with local library systems.
Pioneers like (Serbia) and Knjige.club began offering DRM-free eknjige in EPUB and PDF formats. Unlike the locked Apple ecosystem, Balkan readers preferred open formats that could be read on any device. eknjige
If you meant something else, could you provide more context or check the original spelling? on which e-readers (like Kindle or Kobo) work