In these cases you will need to use Digital Editions to open your books and transfer them to your eReader. You want to read books from the Kobo Store on an eReader from another company. You buy Adobe DRM PDFs from the Kobo Store and want to read them on a Kobo eReader You want to read eBooks from another store or from a library on a Kobo eReader Kobo's reading apps and eReader can automatically download most books from the Kobo Store, and update your library with them.
If you use any of Kobo's free reading apps or a Kobo eReader, you may never need to use Digital Editions at all.
