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If you check out the title you can see that books are an essential theme to this story. Liesel took a lot of chances stealing books from the Nazis. Jewish identity, their very souls are imbedded within the written world. The book burnings hence become a metaphor for the burning of Jews. When Liesel saves a book she saves Jewish identity from ethnic cleansing. The words bring Liesel a reason to keep fighting; they define people like Max who she cares for. Words are ideas and ideas can not be destroyed. Liesel wanted to preserve these ideas.