The Kirk McGarvey series, like its main character, is getting tired. This one is a continuation of Castro's Daughter, the search for buried Spanish treasure in the southwestern U.S. Five different parties are after this mythical horde: the mysterious Voltaire Society, the Spanish government, the Catholic Church, the Cuban government, and an Arab prince. Kirk McGarvey is retired and teaching college kids in Florida, when a guy from Voltaire tries to enlist his help only to be blown to pieces by Spanish intelligence. With innocents killed, McGarvey decides to investigate, finding the offending parties next door, spying on him. After a violent clash, a Catholic Church killer eliminates the escapee and Kirk enlists Otto's help, when Maria Leon reappears. After Maria is almost killed, there is further slaughter in Washington DC before everyone heads to Spain to find a journal and a cipher code. Kind of preposterous.