Reference

Kathrine Taylor was motivated to write the novel "Address Unknown" due to her desire to bring awareness to what the Nazis were doing and to show the American public the reality of Nazi Germany's impact on lives. According to a review, Taylor wanted to highlight what was happening to real, living people under the Nazi regime and used the story as a means to convey the insidious nature of Nazism (source).

Another source mentions that the idea for the story came from Taylor's experience of seeing people returning from Germany and sharing their experiences, which spurred her to write about the rise of Nazi Germany as illustrated through the correspondence between two men, with one being Jewish (source).

Here are some images related to the novel "Address Unknown":