Complex sentence: He returns to Earth over a year later and is met by Lewis and another friend: the remainder of the story is told from Ransom's point of view, with Lewis acting as interlocutor and occasional commentator.
Split into simpler sentences: He returns to Earth over a year later and is met by Lewis and another friend. The remainder of the story is told from Ransom's point of view, with Lewis acting as interlocutor and occasional commentator.