Why is it important that Hollis has to take care of Josie? How does it challenge Hollis, and how does it change her as a character?

This novel is almost entirely set outdoors or in homes with a close connection to the outdoors, with only two brief scenes in official settings (the school and the agency). Why did the author make this choice? How does it affect the world of the novel?

What do cars and other vehicles represent in the book? Think about important vehicles, like the snowmobile, the pickup truck, and the Silver Bullet. Compare and contrast their symbolism and how they impact the plot.