If you're talking about an eInk device, you'll be in a world of pain if you want worthwhile PDFs, which are generally non-reflowable. I've done a big list of s

If you're talking about an eInk device, you'll be in a world of pain if you want worthwhile PDFs, which are generally non-reflowable. I've done a big list of such PDFs for iPad (and other tablet) owners here: PDFs For Free http://mikecanex.wordpress.com/2012/03/22/pdfs-for-free/ http://mikecanex.wordpress.com/2012/03/22/pdfs-for-free/ Your best bet is to stick with ePub on eInk.