One Fifth Avenue, the Art Deco beauty towering over one of Manhattan's oldest and most historically hip neighborhoods, is a one-of-a-kind address, the sort of building you have to earn your way into--one way or another. For the women in Candace Bushnell's new novel, One Fifth Avenue, this edifice is essential to the lives they've carefully established--or hope to establish. From the hedge fund king's wife to the aging gossip columnist to the free-spirited...