What is the most important information O'Brien adds to Norman Bowkers story in the short story "Notes".

In “Notes,” the narrator speaks very candidly about his own narrative tricks. Again he calls attention to the fact that the book is fiction. O’Brien points out that it is a constructed narrative, a piece of artwork rather than a piece of “truth.” O’Brien was emotionally involved with the person, Bowker, but emotional truth does not always indicate factual truth.