Patrick S. Halley is the author of On the Road with Hillary (Viking, 2002); Wimpy (Kelly Press, 2008); and Guide Dogs of America, A History (Kelly Press, 2012). He spent nine years doing advance for Hillary Rodham Clinton. He was Executive Director of the Massachusetts Democratic Party and worked as an advance man or state director in six presidential campaigns. Prior to that he had a career in law enforcement, serving as chief of operations for both the Attorney General of Massachusetts and the Middlesex County District Attorney. He lives in Florida and Massachusetts.