The eBook Files category includes any digital publication of books, magazines, or any other document that can be read using a digital eReader like Amazon Kindle or even a regular PC or smartphone.
Popular eBook file extensions are .EPUB, .PDF, .MOBI and .AZW.
eBook Files (71 file types)
eBook Files - Types & Formats of file extensions
Extension
Name of file type
.lic
.mmap
.ink
.sim
.cnt
.grf
.pfl
.sdm
.rmr
.lyx