I grew up listening to my dad tell stories about the radio shows he listened to during his childhood. He would tell us about gathering around the radio to listen to the Lone Ranger and Roy Rogers and others. I found it fascinating that radio broadcasts had so much reach and influence during WWII. My children would never dream of sitting around listening for entertainment. I loved the idea that the communications over the radio were considered "light." I love the spiritual meaning of light, especially when the Savior himself proclaims, "I am the light of the world: he that followeth me shall not walk in darkness, but shall have the light of life." (John 8:12)
Usually we think of Nazi's and Germans as being evil and everyone else being good. This novel looked for and found the good in who we typically think of as evil and, in some instances found evil, or really just fear, in those we typically think of as good. The young German boy who became the radio technician was greatly influenced by the broadcasts of the French scientist and intellectual. He was able to help save the young French girl.
I've loaned my copy of the book out. When I get it back I want to look up a couple of passages and comment on them specifically...