“But as far as value-adds go the “via” generally offers little more than a cookie crumb trail of others who have also read the material in question—the digital equivalent of finding the previous borrower’s name scribbled on the card in the back of a library book. Which is neat, I guess? But come on now, none of us here is Averroes rediscovering Aristotle or Poggio Bracciolini serendipitously plucking Lucretius off a dusty shelf—this is people posting pictures of yawning kittens on Tumblr blogs we’re talking about here.”