Tears of Amber by Sofia Segovia        

About a group of people thrown together during World War II in East Prussia, what is now the far-western Russian oblast of Kalingrad.  A Polish man and a Polish woman are sent as slaves to help on a German farm.  A second German family is torn apart by the enforced enlistment of the father.  The history of the war works out its tragedy amongst these innocent bystanders just trying to survive a terrible time in history.