The Whiff of Money — James Hadley Chase

Secret Agent Mark Kirkland has been given the task of locating and retrieving three pornographic films. His mission must remain top secret as the films, rather embarrassingly, feature the daughter of the future president of the United States. His quest leads him to the depths of Bavaria, where he finds Soviet agent Malik and sidekick Lu Silk also rather interested in the whereabouts of the films. Who will find them first? And, once found, who's to say they won't immediately disappear again? The thriller maestro of the generation" Manchester Evening News