BILL HAYES (William Brooke Hayes) is an American non-fiction writer and photographer. He has written four books – Sleep DemonsFive QuartsThe Anatomist, and Insomnia City – and has produced one book of photography, How New York Breaks Your Heart. His freelance writing has appeared in a number of periodicals, most notably The New York Times. His most recent book is Sweat: A History of Exercise.

Hayes’ first book, Sleep Demons, was published in 2001. An exploration of insomnia and other sleep disorders, Sleep Demons is part memoir, part trivia collection, and part record of scientific discovery. His second book, Five Quarts: A Personal and Natural History of Blood was published in 2005. In it, Hayes details the history of the scientific exploration of blood, and its many cultural associations. He also recounts his own relationship with an HIV-positive partner, and the science and emotion involved in treating HIV. The Anatomist, published in 2008, is a history of Gray’s Anatomy, released 150 years after its first publication.

Hayes was awarded a Guggenheim Fellowship for non-fiction in 2013.

His fourth book, 2017’s Insomniac City: New York, Oliver, and Me, is a memoir of his life in New York City, and his six-year relationship with neurologist and writer Oliver Sacks.

Hayes is also an accomplished photographer. His latest book