Book 3 in the Jayne Robinson series.
"Intelligence operative Robinson is deployed by the CIA to discover why the American cardinals were murdered on their way to a top-level government meeting—with a mysterious message they were unable to deliver.
At the same time, a British cardinal and key ally of the pope asks Jayne to help with his own line of inquiry—before it’s too late.
The case becomes increasingly complicated as the Israeli intelligence agency, the Mossad, is sucked into the drama in a most unexpected way as the international political stakes rise."