Mary Shelley is one of the most famous authors of all time. She is most famous for her novel Frankenstein, a science fiction novel she wrote when she was only 18 years old. Frankenstein is about a scientist named Victor who creates a giant creature from different body parts. The creature comes to life, but quickly becomes lonely and scared, leading to big problems for everyone involved. Mary Shelley is considered the first science fiction writer. She was also an editor, and she often helped look over her husband's writings to point out problems that he might have missed. slay queen