I store all/most of my ebooks in epub and then convert them into mobi or docx or whatever else I need. I almost never read in epub format except when opening in calibre. I guess was just wondering if epub3 can still convert flawlessly into other formats that need to use the TOC in some other way.
Reason for conversion? COVID19 extra free time, upgrading to better standard, having nicer file internals...dunno.
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