Only DRM free ebooks (PDF, Topaz, mobi/azw/KF7, dual mobi, azw3/KF8, KFX and some others.
Calibre is not needed if they are already DRM free.
The azw3/KF8 is usually closest to what was uploaded to Amazon by a publisher and closest to epub you convert with Calibre, so in that respect is best.
Last edited by Quoth; 07-12-2025 at 11:23 AM.
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