It is only natural that books so beloved by writers would influence the literature that comes after them—and this seems to have been the case with Ferrante. Female friendship has been a significant literary subject for as long as women have been able to publish their work, but the past 10 years have seen more and more novels about prickly, intellectual, and conflictedly maternal women like Elena, as well as gifted and charismatic yet abrasive ones like Lila. Ferrante fever has also moved beyond the conventional bounds of literary appreciation: Her novels have gotten adapted into an HBO series and graphic novels; tributes abound on TikTok and Reddit; and to celebrate the tenth anniversary of the last Neapolitan novel’s publication, its U.S. publisher, Europa Editions, is rereleasing the full quartet in a special cloth-hardcover edition.