The Game of Treachery — Alan Savage

The second in the French Resistance series
Resistance to the Nazi forces occupying France is growing, and the Germans begin to counter-attack. Their principle target is the group headed by the beautiful Liane de Gruchy, and they infiltrate one of their agents into the group. Unaware of this, Liane and her family, in league with her lover, English security officer James Barron, pursue their own agenda of sabotage and subversion until the bloody climax.