: Most modern e-readers and apps, including Apple Books , Google Play Books , and modern Kindle devices, support the EPUB format.

Since the query refers to an (Electronic Publication) file, here is a technical review of the format that would apply to a file with such a name:

: Unlike PDFs, EPUB files are "layout agnostic," meaning the text adjusts its size and flow based on the screen size of the device (Kindle, iPad, or smartphone).