According to one review: "Wendell Pocock, American middle-class victim of repeated heart attacks, becomes Winston Pitt, British worker in an organ bank. A pawn in an international espionage duel, he discovers genuine love and redemption after exhausting the cold consolations of history and philosophy."
Adderly comes into the story at the beginning of Part II where as a former top-tier agent he is reassigned to Miscellaneous Affairs under Melville Greenspan. Though an American agency, the offices of MA are in London.