Messenger. Daniel Silva. 2006.

Gabriel Allon is recovering from a gruelling showdown with a Palestinian master terrorist when a figure from his past arrives in Jerusalem. Monsieur Luigi Donati, private secretary to His Holiness Pope Paul VII, is a man as ruthless as he is intelligent. Now, however, he has come to seek Allen’s help. A young Swiss guard has been found dead in St. Peter’s Basilica and although Donati has allowed the official inquiry to determine that it is suicide, his instinct tells him that it is murder - and that his master is in grave danger. He has trusted Allon in the past, and he is the only man he trusts now.

Allon reluctantly agrees to get involved, but once he begins to investigate he concludes that Donati has every right to be concerned, as following the trail from the heart of the Vatican to the. Alleys of Switzerland and beyond, he slowly unravels a conspiracy of lies and deception.......