Sean Dillon #5 Drink with the Devil Jack Higgins (1996)

From one of the world's most popular authors comes a classic thriller involving an elusive, brilliant terrorist-turned-hero. Ten years after the hijacking of a seagoing barge carrying one hundred million pounds in gold bullion, the President of the United States receives information about its whereabouts and its cargo--riches that are to be used to finance an Irish civil war. The task to stop the players and their deadly game falls to Sean Dillon, once-feared IRA enforcer, now working for British Intelligence.