Jonathon Payne and David Jones novels

Carved into the towering cliffs of central Greece, the Meẗеeora monasteries are all but inaccessible. Holy Trinity is the most isolated, its sacred brotherhood the guardians of a long-forgotten secret. In the dead of night, elite warriors carrying ancient weapons hurl the silent monks from the clifftop to the rocks below. Halfway across Europe, Richard Byrd makes a discovery and calls former MANIACs Jonathon Payne and David Jones for help.

Hidden among the crates in a recently discovered World War II bunker are documents stamped with an elaborate black swan, the insignia of the murdered King Ludwig II. According to legend, Ludwig stockpiled a massive treasure in the years before his death, a cache of gold and jewels that would finance the construction of the largest castle of all time. But in the years since his death, no one has found any evidence that Ludwig had hidden anything. Until...