Beyond 2012: A Shaman's Call to Personal Change and the Transformation of Global Consciousness focuses more on the transformation and less on the 2012. James Endredy is apparently a leader in the field of ecoshamanism -- a field about which I know very little, so you may have to take my comments with a grain of salt.
Endredy opens his consideration of 2012 with a brief overview of various prophecies, followed by the obligatory description of all the usual suspects: volcanic and supervolcanic eruptions, earthquakes, tsunamis, a pole shift, asteroid collisions and a smorgasbord of possible man made disasters.