Both the novel's narrative recounting the travels of protagonists, alternating with the narrative of a family split by episodes seen clearly that the article is a travel narrative, the narrative of the article or the family.
The narrator of the novel recounts the journey of the two protagonists. Interspersed with the story of a family by now that I see clearly indicate what role will narrate the trip or how to tell the story of a family.
The story of the novel both tell the journey of the protagonist. Switch with the narrative of his family by giving in to see clearly that the story about the trip, or chapters, and the story of the family.