Liesel wetting the bed may seem trivial, but it was actually a very important part of the plot. When Liesel wet the bed, her father comes in and reads to her and teaches her to read and write to comfort her and help her go back to sleep. From that point on, Liesel is fascinated by the idea of books and reading. Something as small as Liesel wetting her bed causes a butterfly effect that sets up the plot of the book.
When Liesel