Who is the narrator of Mary Shelley?

Answer 1

Mary Shelley is not the name of the book but the name of the author of such books as Frankenstein and The Last Man. The rest of this answer assumes that we are talking about the novel Frankenstein.

The duty in the book is shared with both Victor's and Captain Walton of the ship that takes him in at the start of the novel

Also the creature has a chapter or two where he is the narrator.

Answer 2

Mary Shelley is not a singular piece of work that can have a narrator. Mary Shelley was an author who wrote "Frankenstein," a novel that features various narrators including Victor Frankenstein and the creature he creates.