Patti McCracken, author of "The Angel Makers: Arsenic, a Midwife, and Modern History's Most Astonishing Murder Ring." The book tells the true and astounding story of what unfolded in a small village in Hungary in the years following World War One when a midwife came to the aid of abused women in the village by surreptitiously killing their abusive husbands by arsenic poisoning. The practice ultimately widened in scope.