High Quality Content by WIKIPEDIA articles! The Power of Now: A Guide to Spiritual Enlightenment is a book by Eckhart Tolle. Published in the late 1990s with an initial printing of 3,000 copies the book`s sales` growth accelerated in 2000 after Oprah Winfrey recommended it in her magazine, O. It has appeared on the New York Times Best Seller list and been translated into 33 languages. As of 2009, three million copies had been sold in North America.