A bit easier than using the serial port, wasn't it?
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Demo devices are also 'special offers' devices.
If you want to use our screen saver package, you'll have to ask Amazon to remove the SO.
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Next step -
Install KOreader.
It is the most complete e-book reader that we have for Kindles.
It recently got its own forum:
https://www.mobileread.com/forums/forumdisplay.php?f=276
Keep in mind that some *.pdf files are actually scanned images, not individual characters.
There are on-line services that will do character recognition of *.pdf image pages.
That would be the first step in converting such *.pdf documents.