The Power of Now: A Guide to Spiritual Enlightenment is a self help book by Eckhart Tolle which seeks to bring about a transformation of human consciousness. It was first published in the late 1990s as a small run of 3,000 copies. Its popularity began to grow, and that growth accelerated after Oprah Winfrey recommended it in her magazine, O, in 2000 (though it was never one of her book club selections)....