Showing Mission to Siena by James Hadley Chase

For years the worldwide operations of a mysterious and ruthless extortioner who calls himself the Tortoise have baffled Scotland Yard and the police forces of Europe. But the Tortoise makes a mistake when he interferes with wealthy American playboy Don Micklem, who has friends in high places, and soon tracks him to his lair . . .



'The thriller maestro of the generation' Manchester Evening News