How do you think the heroes (Liesel, Rudy) in this book learned from each other?

Liesel's relationship with Rudy grew from two complete strangers to a relationship similar to best friends or siblings in which they could trust each other greatly. I think they learn trust and unconditional love from each other. Rudy has more romantic feelings for Liesel and by the end of the book one could think that it could have blossomed into something more than friendship.

Hi Aslan, for one of the questions, i thought Liesel and Rudy were both the same age when they met each other but jill says that Rudy was 11 and Liesel was 9.