I came across this website: http://www.diybookscanner.org/
I must say I had no idea books could be scanned this way. Yes, I used my digital camera to take a picture of a document or a page of a book before, but never could I imagine the whole set-up, let alone two cameras. (The funny thing was when I first saw the pictures on the web page, first question came to my mind was "Where did the flat-bed scanner fit in?")
I don't think I'll go this far, but who knows?
