Originally Posted by Wilcoo
the books are in epub format.
yes, in calibre i have covers in the metadata in calibre.
i did not convert them, should i ?
Converting books is the only way to guarantee that the cover is embedded into the ePub file. If necessary this can be an ePub->ePub conversion.
Depending on the method you use to transfer the books from Calibre, Calibre will attempt to update the cover as part of the transfer, but it can only do so if it can identify the existing cover. You did not mention how you are transferring the books?