The beauty, sublimity, and wonder of nature have been justly celebrated in all of the religious traditions of the world, but usually these traditions have focused on beings or powers presumed to lie behind nature, providing nature's ultimate explanation and meaning. In a radical departure, Donald A. Crosby makes an eloquent case for regarding nature itself as the focus of religion, conceived without God, gods, or animating spirits of any kind, and argues that nature is metaphysically ultimate. He explores the concept of nature, the place of humans in nature, the responsibilities of humans to one another and to their natural environments, and offers a religious vision that grants to nature the kind of reverence, awe, love, and devotion formerly reserved for God. Crosby also shares his personal journey from theistic faith to a religion of nature.