Hi! I'm a new employee of the Internet Archive, formerly a search engine guy, mostly working on search for the Wayback Machine. In my spare time I've been working on a visualization of dates and entities in scanned book contents. There's a blog post about it here: https://blog.archive.org/2016/02/09/how-will-we-explore-books-in-the-21st-century/ And the demo itself is here: https://books.archivelab.org/dateviz/ I'm going to be attending the Philly conference, and I'm looking forward to hearing from folks about other discovery tools driven by content or algorithmic metadata. -- greg