This is a lot to read, but it has what looks to be some pretty impressive illustrations and graphs that follow the long count calendar of the Mayans depicting the end of the world (as we know it).
It is well composed and offers a lot of information concerning the calendar and what a group of individuals is trying to do to avoid the year 2012 by adopting a new 13 moon calendar.
Very interesting stuff. http://www.tortuga.com/foundation/campaign/docs/book/g3.html
Also found some interesting correlations between astronomy and the year 2012. http://www.astrologyweekly.com/astrology-articles/transition-new-energy-2012.php