However, there's one instance that could be considered onomatopoeia:
* "The truck's engine coughed and sputtered, and then it died." (Chapter 1)
This is a slight stretch, but the verbs "cough" and "sputter" evoke the sounds a dying engine might make. While not a perfect example, it's the closest the book gets to onomatopoeia.
Let me know if you'd like to explore other literary devices present in the book.