Hello I'd like to keep a pdf backup copy (or any other free format) of all my kindle's books "just in case" something could go wrong with kindle in the future.
I made some tests using Calibre (latest version) with DeDrm 10.0.2 plugin and I was able to save a pdf copy of some books (AZW files), but not all of them. There's a book that can't be converted (neither viewed since it takes long for opening the viewing window and at the end is displayed with a mess of unreadable characters) so I'm looking for advice.
I was not able to convert that book using Mac versions of both Kindle and Calibre, neither with Windows versions...(but same DeDrm plugin version 10.0.2)
I don't realize why ONLY that book (till now at least, since I tried with just a few books...) can't be converted
