•Why it earns a slot
Why it earns a slot: it turns the etiquette of old New York into a suspense machine, showing how a society can destroy a love affair using nothing but dinner invitations and silence.
A New York lawyer engaged to the perfect society bride falls for her disgraced, separated cousin, and learns the family customs he thought would protect him are the trap.
This distillation is written from the freely available original, which is always the better read when you have the time: Project Gutenberg.