I had the impression Veronesi was a kind of detective novel, noir fiction writer; at least that's how he has been marketed by his publisher in Spanish language. If he was won the Strega twice, then probably the fault is on the publishing house (Alfagura, part of the Penguin Random House monster).
Did you read last year's winner, the novel by Scurati? It appeared recently in Spanish translation, but again, it was announced as the "definite work on Mussolini's coming to power" (by the same Alfaguara guys), and this ambitious, bombastic description made me doubt about the real heights of the book.