The Echelon Vendetta (2007)

When a mission goes awry in David Stone's The Echelon Vendetta, the CIA calls in Micah Dalton, a ''cleaner'' who dispassionately mops up the mess. But then a friend and fellow agent dies in an apparent suicide and the pal's family is found hacked to death. As he follows the trail from Tuscany to London to CIA headquarters to the Rocky Mountains, Dalton encounters government spooks, Native American mysticism, hallucinogens, and gruesome violence with which he seems creepily comfortable. But Stone's unsettling tale keeps losing momentum, due to his nasty habit of interrupting the action with poetic travelogues at each new stop around the globe.