Final answer:
The last book Liesel steals, 'The Dream Carrier,' symbolizes hope, the power of words, and her growth from a reader to a storyteller.
Step-by-step explanation:
The symbolic importance of the last book Liesel obtains in 'The Book Thief,' titled The Dream Carrier, is significant as it represents hope, the power of words, and coping mechanisms during times of extreme hardship. Books in the novel are often symbolic of escape and knowledge for Liesel. This particular book also signifies the personal growth of Liesel as she becomes not just a receiver of stories, but a creator of them, eventually writing her own story in the basement. Additionally, the very act of stealing books is her way of resisting the oppressive regime she lives under.