There are handheld document scanners on the market that are about 1" in height and width. These would allow scanning without breaking the spine of most books... If there is a rare book that someone would like to scan I can certainly build one that tapers down from 1" in height to less than 1/4" so it could be slipped into the page and scan away. You would only need to open the book slightly, even less than you need to see the text with your own eyes. Just a thought.