I'm a little confused about the value of scanning rare books since this story came out. I have a small collection of "rare" books and they're not really bounties of information, at least not modern information. I know novel training corpus is important but the information in rare non-fiction books is commonplace or out-dated. And the information in old rare fiction-books are originals for which reprints exist or just uninteresting stories that aren't really worth anyone's time except collectors'.