The Age of Innocence, is beyond and by far her best book. It is a study of the restricted life of those who move in the 'best circles' in New York. It is a study of a woman who wouldn't conform and a man, trapped into doing so.
If Meghan Markle found the Royal family stuffy and restricted, she should read this story of her own country 150 years ago.
It was made into a film by Martin Scorsese and starred Daniel Day-Lewis and Michelle Pfeiffer