This early work by Anna Katharine Green was originally published in 1883 and we are now republishing it with a brand new introduction. 'X Y Z' is one of Green's novels of crime and mystery. Anna Katharine Green was born in Brooklyn, New York, USA in 1846. She aspired to be a writer from a young age, and corresponded with Ralph Waldo Emerson during her late teens. When her poetry failed to gain rec...