Liesel's first steals a book on January 13, 1939. The second one is taken on April 20, 1940, four hundred and sixty three days later.
This second act of book thievery is important to the story.
It opens up a world of book stealing opportunities and helps Hans figure out "a plan to help the Jewish fist fighter."
Death thinks that Nazi Germany would not have been able to do what it did, if the German people did not love burning things, including "Shops, synagogues, […] personal items, slain people, and of course, books" (13.8).
Liesel steals The Shoulder Shrug, her second stolen book, from a book burning.
Liesel is driven to steal the book by "anger and dark hatred" (13.8).
The book burning happens on April 20, which is Hitler's birthday.
When she rescues the burning book, "Liesel [is] a girl made of darkness" (13.8).
For us to understand what Liesel is so mad about, Death will have to take us back a few months.