On December 21, 2012, the Mayan calendar will end. Many see it as an apocalyptic sign.But is it?In The Twelfth Insight, the long-awaited fourth book in the beloved Celestine Series, we again follow our Hero and his close friend Wil. They have just received a portion of another ancient and mysterious manuscript that describes a secret approach to spirituality that is silently arriving in the second decade of the 21st Century. But the manuscript is only available in fragments.