Elena Ferrante--named one of the 100 most influential people in 2016 by Time magazine--is best known for her Neapolitan novels, which explore such themes as the complexity of female friendship; the joys and constraints of motherhood; the impact of changing gender roles; the pervasiveness of male violence; the struggle for upward mobility; and the impact of the feminist movement. Ferrante's three novellas encompass similar themes, focusing...