Copper Fire by Suzanne Woods Fisher
It is the story of a young woman, Louisa, who had worked in the German Resistance Movement with theologian Dietrich Bonhoeffer and fled to a small copper mining town in Arizona.
Copper Fire starts off on a summer day in 1945 as Louisa receives a telegram from the International Red Cross Tracing Service. Her young cousin, Elisabeth, has just been released from Dachau, a concentration camp, and Louisa is her only remaining relative.
Determined to go to war-torn Germany to retrieve her cousin, Louisa is also on a mission to discover the whereabouts of Friedrich Mueller, a Nazi sympathizer who fled Copper Springs, Arizona. What Louisa never expected was to meet the man she had once loved.
And now hated.