Mary Shelley uses a frame narrative (a story within a story) to introduce the tale of Victor Frankenstein and his creation. Shelley chose to begin the novel with a series of letters from the explorer, Robert Walton, to his sister. Why might Shelley have chosen this structure for her story? What does it add to the novel, thus far? Do you enjoy the use of the frame narrative or not? In an essay of at least 300 words, analyze why Shelley might have chosen this structure. Support your analysis with evidence from the text, as well as your own inferences.