First off, how old are you? That answer will dictate our responses depending on how far into the recruiting process you should be.
Literature does not mean much. I actually wrote an article for Steven that relates to this: http://www.stevenellis.com/steven_ellis_the_complete/2009/02/guest-post-comm.html
Once they start coming to your games and asking you to come down for visits, then that means they are interested. I cannot even begin to tell you how many pamphlets I received from schools that were "interested" in me. Keep in contact with them, and soon enough you will know if they are truly interested.