Nathaniel Popkin is an author, editor, film writer, architecture and literary critic, journalist, and historian. Since the 2002 publication of his first book, Song of the City: An Intimate History of the American Urban Landscape, (Four Walls, Eight Windows-Basic Books), and continuing into his role as co-editor of the Hidden City Daily and writer of the film series "Philadelphia: The Great Experiment," he has been a distinctive voice in the conversation about cities: past, present and future. LION AND LEOPARD (The Head and The Hand Press, 2013) is his third book and first novel.