Here are some key instances:
* The constant presence of death: Throughout the book, Death narrates the story, emphasizing the fragility of life and the inevitability of death. This creates a pervasive atmosphere of mortality, making it clear that no character is immune to its grasp.
* Rudy's fascination with death: Rudy's playful yet morbid fascination with death, his constant references to his own demise, and his playful engagement with the subject foreshadow his own mortality.
* The war's toll on innocence: The escalating horrors of the war, the constant threats, and the loss of innocent lives create a sense of foreboding, making it clear that even seemingly safe characters can be caught in its destructive grip.
* The themes of loss and sacrifice: The book explores the themes of loss and sacrifice, highlighting the pain and grief that accompany death. This prepares the reader for the emotional impact of Rudy's death and underscores the inherent vulnerability of life during wartime.
* The fleeting nature of happiness: The book portrays the ephemeral nature of joy and happiness, suggesting that even the happiest moments can be abruptly cut short. This reinforces the understanding that life is precious and can be taken away at any moment.
Zusak doesn't offer explicit clues to Rudy's death, but the constant presence of death as a narrative voice, the war's destructive force, and the book's exploration of themes like loss and sacrifice all contribute to an undercurrent of impending doom that makes Rudy's death a poignant and unavoidable tragedy.