The 12 Most Influential Spiritual Books of the Past 50 Years The Secret by Rhonda Byrne. ... The Celestine Prophecy by James Redfield. ... The Alchemist by Paulo Coelho. ... The Art of Happiness: A Handbook for Living by Dalai Lama XIV and Howard C. ... A New Earth: Awakening to Your Life's Purpose by Eckhart Tolle. More items... Jan 22, 2015