The site is http://hnlikes.com/ http://hnlikes.com/ and on the About page I describe how it was done. Like I mentioned it only looks for books that are linked

The site is http://hnlikes.com/ http://hnlikes.com/ and on the About page I describe how it was done. Like I mentioned it only looks for books that are linked (or videos, arxiv papers, Wikipedia etc.). I then use the link to get information from the site itself. I calculate scores for the given link weighted by a number of metrics. I'm sorry if I gave the impression this was fancier than it actually is.