As Bryson chats with Dave, he begins to realize how much of a commitment it’s going to be to hike in the United States. He needs to prepare for total isolation and have all the survival tools he needs with him. It’s already becoming clear that what he’s signed up for is going to be nothing like any hiking he’s done before. His purchase of the book on bear attacks foreshadows Bryson’s developing fixation on bears, which represent his—and, more generally, humanity’s—inflated fear of the wild.