What kind of woman would leave her husband, her children and her home to live behind the Iron Curtain and work for the KGB? 'Spy sinker' is a novel of many interlocking puzzles, for with the third person narrative comes a very different picture of characters we thought we knew so well from previous books Conceived from the beginning as one complex plot, Deighton's great saga ends, like 'Spy line', in 1987 when Fiona Samson's mission is complete