Don Cavelli and the Dead Cardinal

"The cardinal was found dead in the Negev desert" - this news stirred up all the world news channels. What drove the esteemed seventy-year-old servant of the church, one of the most likely candidates for the papal throne, Eduardo Fontana, to set out alone on foot and without a water supply to this desolate place? Donato Cavelli has the key to this mystery. While investigating the death of a good friend, he unexpectedly learns the solution to one of the loudest crimes of the twentieth century.