The other conflict taking place in this novel is character vs. self. Leisel has to battle herself to keep the families secret in and not tell Rudy, her kind and loving friend who Leisel wishes to tell but has to know better and keep her mouth shut. She also has to restrain herself from stealing books all the time, as she has a promise with her papa not to steal books anymore.
There are many other different conflicts through out the story, such as character vs. character, and character vs. fate/chance, but the ones I stated, I feel are the most important and consequential to the story line.
Liesel, if you tell anyone about the man up there, we will be in big trouble. At the very least, Mama and I will be taken away.
-Hans Hubermann (pg. 203)