Quote:
Originally Posted by Sirtel
Frankly, I don't understand a word in those posts.  In baby words, what do they do?
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amazon puts bookmarks, highlights locations, annotations, etc. in some of the files in the .sdr directory for the book.
Four years ago jhowell reverse engineered the formats for these files and provided software to read them. He was mainly satisfying his curiousity and has no interest in doing further development.
Very recently, willemml published software that can both read and write these files. I think that willemml is mainly interested in changing these files rather than exporting or importing data from other platforms or converting between kindle formats. But now a programmer wanting to build such tools does not have to independently develop the ability to read and write these files.