Five college friends have arrived at forty in very different circumstances, but with at least one thing in common: they are among the more privileged in society. Elizabeth and Sara are lawyers, Martha is a doctor, Carmen is a wealthy and well-educated homemaker, and Heather, the most successful, is a famous tech executive—and after more than two decades of friendship, they know one another better than anyone.Then Heather writes a women’s advice book detailing the key life “mistakes...

Five college friends have arrived at forty in very different circumstances, but with at least one thing in common: they are among the more privileged in society. Elizabeth and Sara are lawyers, Martha is a doctor, Carmen is a wealthy and well-educated homemaker, and Heather, the most successful, is a famous tech executive—and after more than two decades of friendship, they know one another better than anyone.Then Heather writes a women’s advice book detailing the key life “mistakes...