Waking Up: A Guide to Spirituality Without Religion is a 2014 book by Sam Harris that discusses a wide range of topics including secular spirituality (essentially within the context of spiritual naturalism), the illusion of the self, psychedelics, and meditation. He attempts to show that a certain form of spirituality is integral to understanding the nature of the mind. In late September 2014, the book reached #5 on the New York Times Non-Fiction Best Sellers list.