What is the narrator point of view in the nonfiction book, A Long Walk to Water?

The novel is written in the third person, and is related with the focus on either Nya's or Salva's point of view, depending which of the two stories is being told. Either Nya or Salva is at the center of every scene in the novel, and the action and events in the story are presented as they are seen and experienced by these two main characters.