The three personas of the memoirist:
The author is the person giving the lecture, doing the interviews, and presenting his work to the public.
The narrator is the person in the book, telling the story. He lives forever between the covers. He is the person most loved and known—by the readers.
The writer is the private person, rarely known even to his friends and family. He agonizes over sentences, makes ridiculous sacrifices for his craft, and is often his own worse critic.