This is certainly a good twist on World War II and Holocaust stories. There were many Germans who thought that what Hitler was doing was right, or things would not have become as dire as they did for the Jewish population. It's easy to paint all Nazis as pure evil, but this was an interestingly nuanced treatment of a child having to deal with a relative who was working for a side with which she herself didn't agree. Having a dog, as well as a family mystery, is a nice touch. Wendy's escape scene reminded me of the one in Number the Stars. This would be a good book to pair with that, or to use in a study unit on World War II or the Holocaust.