NICOLE WALKER is the author of the forthcoming collection The After-Normal: Brief, Alphabetical Essays on a Changing Planet from Rose Metal Press. Her previous books include Sustainability: A Love Story, Where the Tiny Things Are, Egg, Micrograms, Quench Your Thirst with Salt, and This Noisy Egg. She edited for Bloomsbury the essay collections Science of Story with Sean Prentiss and with Margot Singer, Bending Genre: Essays on Creative Nonfiction. She’s nonfiction editor at Diagram and Professor at Northern Arizona University in Flagstaff.