ePub is one of Amazon's preferred formats for uploading which they convert as needed. Given that Amazon is dropping or has dropped (the reports on the cutoff date keep changing) uploading .mobi, a well formatted ePub file or a properly styled Word document are probably the best formats for uploading to KDP or using with Send to Kindle.
One author acquaintance of mine tried creating a .kpf file from their ePub master using Kindle Previewer but trying to upload the .kpf to KDP turned into a total snafu. Send to Kindle does not accept a .kpf format ebook. It seems that Amazon does not want to eat their own dog food.
When testing ebooks that I am formatting for others, I will use Sigil and/or calibre's editor to create an ePub that passes epubcheck and then use calibre and/or Send to Kindle to convert for testing in Amazon's apps and Kindle eInk ereaders.
Last edited by DNSB; 11-10-2023 at 09:55 PM.
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