 In some cases, the narrator is writing a book—"the book in your hands"—and therefore he has most of the powers and knowledge of the author.Examples include "The Name of the Rose" by Umberto Eco, and "The Curious Incident of the Dog in the Night-Time" by Mark Haddon.Another example is a fictional "Autobiography of James T. Kirk" which was "Edited" by David A. Goodman who was the actual writer of that book and playing the part of James Kirk (Gene Roddenberry's Star Trek) as he wrote the novel.