The Story of the Lost Child by Elena Ferrante
This is the final Neapolitan novel. If you have read them all, you have followed Elena and Lila as they marry, divorce, bear children, and become successful: Elena as an author, Lila as the owner of a computer software business. Despite their success, they continue to live in the neighborhood, with its history of violence and crime. Lila never left, Elena returns to raise her daughters, and they live in different apartments in the same building as their late middle age unfolds. The lifelong friendship between these two women is the core of this story, with episodes from their childhood forming recurring themes. I found each of these novels to be more compelling than the last.