William J. O'Brien is an artist, writer, and educator based in Chicago. O'Brien's works are featured in collections worldwide, including those at the Cleveland Clinic, Miami Art Museum, and The Art Institute of Chicago. Originally from Northeast Ohio, as a child, he was part of the St. Helen's Unicycle Drill Team. Additionally, he is a professor of Ceramics at the School of the Art Institute of Chicago. Nighttime Kingdom is his debut novel.