With over 10 million copies of her "Neapolitan Novels" sold in over 50 countries, Elena Ferrante is a global literary sensation. She was named one of Time Magazine's 100 Most Influential People in the World and HBO recently turned the first book in the quartet, My Brilliant Friend, into a miniseries hit with more seasons to come. The world-hopping documentary Ferrante Fever journeys between New York City's cultural hub and Ferrante's native Italy, exploring how an anonymous author's visceral tales of love and friendship gained such an enthusiastic following. Hillary Clinton, Roberto Saviano, Jonathan Franzen and others weigh in on the Ferrante "craze" and what makes her work-and her mysterious persona-so uniquely captivating.