Quote:
Originally Posted by jhowell
First, I suggest that you rethink using PDF as your archival format. PDF locks you into a single screen size, font, and font size. You will be unable to change things later if your device or eyesight changes. EPUB is probably the best archival format for ebooks. Keeping the original format without DRM is also a good idea.
Second, there are several variations of MOBI format. It is likely that the garbled appearing book is actually a PDF with a MOBI wrapper. The KindleUnpack plugin can extract the PDF from it if this is the case. (Calibre handles this variant only if it has a AZW4 extension. DeDRM sets the wrong extension when run under calibre 5.x)
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You rock! Thanks very much for the advice! Converting to epub or mobi didn't work for that specific book, but finally installing the KindleUnpack plugin and using it for extracting directly the PDF worked like a charm. So I couldn't convert to epub or mobi but at least I have a printable-like pdf of the book.
And I think you're right... the book itself doesn't look like an e-book strictly speaking, but just a pdf encapsulated into a kindle mobi format.
I also read the following "sub-discussion" regarding the preferable format to keep the drm-free copies of the books and yes... you're right again, I think EPUB is the way to go.