Comprising a selection of  essays, Upstream finds beloved poet Mary Oliver reflecting on her astonishment and admiration for the natural world and the craft of writing.  As she contemplates the pleasure of artistic labor, finding solace and safety within the woods, and the joyful and rhythmic beating of wings, Oliver intimately shares with her readers her quiet discoveries, boundless curiosity, and exuberance for the grandeur of our world. This radiant collection of her work, with some pieces published here for the first time, reaffirms Oliver as a passionate and prolific observer whose thoughtful meditations on spiders, writing a poem, blue fin tuna, and Ralph Waldo Emerson inspire us all to discover wonder and awe in life's smallest corners.