All God's Children, Peacemakers Series by Anna Schmidt and published by Barbour Publishing.
Beth Bridgewater, a German American, finds herself in a nightmare as World War II erupts - a war in which she takes no side, for she is a Quaker pacifist. Just as she gains opportunity to escape Germany, Beth decides to stay to help the helpless. Meanwhile, Josef Buch, a passionately patriot German, is becoming involved in his own secret ways of resisting the Nazis... Despite their differences, Beth and Josef join together in nonviolent resistance-and in love. Does their love stand a chance... if they even survive at all?