With Pulitzer Prize winner Carl Bernstein he wrote a bestselling biography of John Paul II, published in numerous countries in Europe and the Americas.
In an exclusive interview with the Prefect of the Congregation for the Doctrine of the Faith, Joseph Ratzinger, published in La Repubblica on November 19, 2004, he had identified the German cardinal as a candidate for the papacy.
[5] The transmission ABC News Special Event", of which he was an expert on the election of John Paul II's successor, won the 2006 Alfred I.duPont-Columbia University award for information on the 2005 conclave.
Crisi di un papato, Laterza (2011) illustrated the blind alley in which the Catholic Church had arrived, prefiguring Benedict XVI's retirement a year in advance.
Il segreto di una rivoluzione, Laterza 2014, he highlighted the existence of strong opposition to the reforms of Pope Francis from both Vatican curia and the bishops' conferences, as well as from the Mafia.