Claudio Gatti, an investigative reporter with Italy's Il Sole 24 Ore business daily, said he didn't solve any real mystery since Ferrante's true identity was an open secret within Italy's literary circles.
"All I did was expose a lie," he said: "I used the only thing that works: Follow the money."
Gatti's expose appeared in Il Sole, the New York Review of Books and French and German publications Sunday, sparking immediate criticism from Ferrante fans and fellow writers that he had invaded the author's privacy. Neither the author nor the publisher has confirmed or denied the story.
The mother married a Neapolitan magistrate and settled in Rome, where the author grew up.
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Ferrante's quartet of novels about the lifelong friendship of two girls who grew up poor in post-war Naples has won fans around the world. The books detail the complexities of female friendship, the rise of feminism in Italy and the insidious normalcy of violence and organized crime in Italy's poor south.
The narrative is that Ferrante grew up poor in Naples, one of four daughters of a seamstress, with no mention of the Holocaust.
Ferrante's heroines Lila and Lenu are "strong, powerful women who survived" - much as Ferrante's own mother was a survivor of the 20th century's worst horror, Gatti said.
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