They are hand-picked. The project was to encourage people to adopt a new way of reading where you'd highlight useful passages while reading. In addition, to imp

They are hand-picked. The project was to encourage people to adopt a new way of reading where you'd highlight useful passages while reading. In addition, to improving retention rates (as you are forced to re-read the highlighted passage), you submit them to the site for ranking, and get to revisit them at your leisure. This would essentially allow you to refresh your memory as to the contents of a certain book (instead of rereading it entirely). Moreover, you'd help others who don't have time to read the book (and only want to see its gist). Your side project is pretty neat. I worked on something similar once that involved the Open Text Summarizer (OTS).