Circle of Six the True Story of New York's Most Notorious Copkiller and the Cop Who Risked Everything to Catch Him (Hardcover) → Paperback ISBN-13: 9781932857399 ISBN-10: 1932857397 Genre: Nonfiction 2 Circle of Six the True Story of New York's Most Notorious Cop Killer and the Cop Who Risked Everything to Catch Him (Paperback) → Hardcover ISBN-13: 9781932857856 ISBN-10: 1932857850 Genres: Biographies & Memoirs, Politics & Social Sciences 3 |