Legacy of Hate — Alan Savage

The third in the French Resistance series
In Nazi-occupied France, the assassination of a new German commandant by Amalie de Gruchy sparks a crisis in both Nazi Germany and the British secret service.
Supposedly killed in a raid a few months previously, Amalie is now being pursued by, amongst others, the head of the German secret police and the mysterious Joanna Jonnson, a spy with a murky past. Amalie's beautiful sister, Liane de Gruchy also thought to have been killed months before comes out of hiding to help in the search for Amalie.
But soon the Resistance finds itself with a much bigger problem as the Germans uncover British plans which, in the wrong hands, could change the course of the war.