If you add DRM to an EPUB ebook, it can still work on most normal reading devices. But there is an important condition: the device or app must support that DRM system. For example, EPUB files are usually read on
How to protect EPUB ebooks with DRM and let users read online in a browser
Many people ask a simple question: “Can EPUB files work with DRM, and can users still read them on different devices?” Here is a clear explanation based on real usage. EPUB DRM protection (how it works) For EPUB files, the