Mercier's relationship with Anna Skarbek was also different as it wasn't the usual thing of the woman just falls for the man. Mainly by the fact that Anna is in a relationship and the supposed death of her partner Max Mostov leads her to flee to Spain, while Mercier is sent to Czechoslovakia. It was good how having the two start an affair and then get torn apart allowed for me to want them to find each other again and reunite, which later happens. The two character alone do a lot to keep the story going and showing different aspects of the pre-war Europe that we may not know much about.
The setting of the story, in pre-war 1937 Warsaw where the emerging presence of the Nazis and the prospect of war make it a very interesting background. This setting allowed for much of the tension to be created as Mercier tried to discover what the Nazis were planning and at the end of the story where Mercier and Anna had to escape Warsaw, while a Jewish couple took their own lives after becoming informants for Mercier and pursued by the Nazis, which was done in a very touching and appropriate manner.