An industry -
standard EAN bar code with price and 13 - digit ISBN encoded / embedded into the barcode should be included on the back of every book.
Not exact matches
All it needs for SKUs are the ISBNs the ebooks come with and a few assigned SKU numbers for its other goods, like readers, which it will assign using the
EAN - 13
standards (which have the same format as ISBNs).
All of these channels require a
standard bar code of your ISBN and
EAN in order to process the sale of your books.