@eggheadbooks1: You can ignore all confusing Amazon statements about Unicode support for the following reasons:
1. As far as Kindle books are concerned, only KindleGen Unicode support matters, and KindleGen and its precursor MobiGen have supported Unicode for a long time.
2. The
epub2 specs require all books to be encoded as either utf-8 or utf-16. (utf-16 was presumably only added because it can theoretically reduce the size of
CJK HTML files by 20-30%.)
3. KindleGen explicitly supports valid epub2 and epub3 books as input files. (KindleGen doesn't support all epub3/CSS3 features, though.)
Code:
Usage : kindlegen [filename.opf/.htm/.html/.epub/.zip or directory] [-c0 or -c1 or c2] [-verbose] [-western] [-o <file name>]
For all these reasons, utf-8 is the best format for both epubs
and Amazon KDP books.