The Last Nazi by Andrew Turpin

This has it all. Buried Nazi treasure, political wheeling and dealing, revenge, greed and ruthless killers. Joe Johnson has been hunting war criminals for years after a stint in the CIA. When rumors are leaked that Nazi treasure might finance the contender of the Republican party, a newspaper hires Johnson to find out the truth. But people don’t like having him poking into matters better left in the past. From the United States to Argentina and England to Poland, this story just doesn’t stop until the last bullet is fired.