Complex sentence: Many of the events of the novel are narrated twice; first by the'editor', who gives his account of the facts as he understands them to be, and then in the words of the'sinner' himself.
Split into simpler sentences: Many of the events of the novel are narrated twice. First by the'editor', who gives his account of the facts as he understands them to be, and then in the words of the'sinner' himself.