Number the Stars kind of turns the idea of being a criminal upside down. Good people like Henrik, Peter, and Annemarie's whole family do things that are technically against the law—and punishable by death, to boot. What we mean is, according the Nazi laws that are in place in Denmark in the early 1940s, they're all criminals. But according to our standards of decency and morality, the Johansens and Peter are simply doing the right thing, and the Nazis are the criminals. Of course that raises the question: what does it mean to really commit a crime? Is it all just a matter of perspective?
Number the Stars argues that, during wartime, honoring your own moral code is way more important than obeying the laws of a foreign government.
The Nazis are the only criminals in this book.