Rudy Steiner was scared of the book thief's kiss. He must have longed for it so much. He must have loved her so incredibly hard. So hard that he would never ask for her lips again and would go to his grave without them." - The Book Thief
This is the scene after Liesel and Rudy have to jump in the river to save the book. Rudy jumps into the water and fishes the book out. As they walk home he calls her the book thief and she calls him a fish.
The Book Thief Somewhere, too, in the gaps between a period and the next capital letter, there was also Max. She remembered reading to him when he was sick. Is he in the basement?she wondered.Or is he stealing a glimpse of the sky again?
In the book, Liesel finds Rudy's dead body and finally kisses him. This is very significant because Rudy was always asking her for a kiss, although he knew she would refuse. Rudy was in love with Liesel and Liesel was secretly in love with him too.