I just read Mobi is not cool anymore: https://www.mobileread.com/forums/sho....php?p=2356956
Originally Posted by kovidgoyal
MOBI is still the default. Amazon's support for KF8 is not nearly mature enough to warrant making it the default.
So which format to use? KF8, AZW3 or Mobi? Mobi is still the default, though.
As for the converting software: Calibre is the best?