Sons of Cain - Christy Kenneally

The year is 1953. As the Cold War divides the world, two childhood friends - now foes - carve out an existence. Karl, haunted by the past, teaches history in his home town of Hallstatt, while Max, driven by power and wealth, leads the Fratres, an extreme branch of the Catholic Church -with control of the Vatican his ultimate goal.
When Karl is called to Rome to expose the corruption that has infiltrated the Church, the two men are destined to meet again. The past must be put to rest. But at what cost?
From Moscow to CIA Headquarters to a Budapest prison, Sons of Cain is an epic tale of lust, power and corruption where deception is a way of life.