Quote:
Originally Posted by steve1977
Don't think that what's got me in trouble. Anyhow, I now know per your description above how to add it back. So, this will keep me busy for a while.
I am still trying to figure out whether I have epub2 or epub3 ebooks. And whether series ir properly embedded in the tags. How can I see whether it is epub 2 and epub3. And any way to read what has been embedded?
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you can always open it with the commandline
viewer BEFORE you add.
It should already be on the start menu under Calibre,

if it has a NAV file it WAS (at sometime), a EPUB3.
If the INTERNAL OPF has a line says the version is other than 2.x