Quote:
Originally Posted by eschwartz
There is a cdetype (exth 501 header) field, which controls whether a book displays as PDOC or EBOK. calibre will correctly set it to EBOK if you change that tag (technically you can simply leave the option blank, as you discovered multiple sources arguing over).
However, once you send the book to Amazon, they post-process the book and turn it into a PDOC.
Because Amazon wants to...
Possibly they don't want you having a Personal Document which cannot be read by older devices, but I don't buy that -- I think it is simply a stupid oversight.
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Thanks again, I'll settle for that & not wade deeper into the mire.
the "once you send the book to amazon" bit explains why I don't see this behaviour if I use CC to wirelessly put mobi onto tablet.