Four years later, still my favorite "conspiracy theory". Although it seems almost obvious at this point. Domenico Starnone and Anita Raja wrote the books together, and revealed it in the plot of the books themselves.
I think Elena Ferrante is two people writing together, hinted at by the scene in My Brilliant Friend where Elena and Lila write an essay together, with Elena providing the core ideas and Lila crafting the final prose
