NICOLE WALKER is the author of The After-Normal: Brief, Alphabetical Essays on a Changing Planet; Sustainability: A Love Story; A Survival Guide for Life in the Ruins; and other books. Her work has been published in Orion, Boston Review, Creative Nonfiction, Brevity, The Normal School, and elsewhere. Recipient of a fellowship from the National Endowment for the Arts and noted in multiple editions of The Best American Essays, Walker is nonfiction editor at Diagram and professor at Northern Arizona University in Flagstaff, Arizona.