Bill Hayes is the recipient of a Guggenheim Fellowship in nonfiction, a frequent contributor to the New York Times and the author of four books: Insomniac City: New York, Oliver Sacks, and Me; The Anatomist; Five Quarts; and Sleep Demons. His photography has appeared in The New Yorker and The New York Times. His portraits of his partner, the late Oliver Sacks, appear in the volume of Dr. Sacks’s suite of essays, Gratitude. A collection of his street photography, How New York Breaks Your Heart, was published last year by Bloomsbury. Hayes serves as a co-editor of Dr. Sacks’ posthumously published work, including the forthcoming final volume of his essays, Everything In Its Place. He lives in New York City.