Cormac McCarthy's novel, The Road, details a post-apocalyptic world that an unnamed father and son must traverse in order to survive. Staying at any one place is far too dangerous. That said, traveling is not easy either.
By the end of the novel, after many trials and tribulations, the father ends up dying as the result of a progressively worsening cough. The boy, truly alone for the first time, begins to formulate a plan to insure his survival. Prior to leaving his father's side, a man approaches the boy. The man invites the boy to join his own family. The boy leaves his dead father and joins the man's family.
While it is not explicitly stated that the boy survives or not, readers can assume that the boy successfully joins the man's family and continues to fight for his life.