It accepted dual-format mobi (old mobi + kf8), probably still does. The same as what they wanted for KDP. Calibre will cook that if you select the right options. But this doesn't get converted to kfx, which is required for Sticky Notes etc. For that, you need to send ePub, which is also now what KDP accepts.
Last edited by tomsem; 01-07-2023 at 04:40 PM.
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