That really depends on who 'she' is. Different authors start writing their first novels at various ages. Without knowing the specific person, it's hard to give an exact age.
I'm not sure. It could be in her twenties, or even younger or older. The age varies greatly depending on the individual and their circumstances and inspirations.
I have no definite information on that. The age at which an author pens a novel can be anywhere from their twenties to much older. It all depends on their inspiration and circumstances.
I really don't know. Without more background or specific details about Mary and the novel, we can't figure out her age when she wrote it.
Mary Shelley was 18 when she wrote the novel.
Taylor Swift was around 18 years old when she wrote 'Love Story'.
Christie worked at a hospital when she wrote her first novel.
I'm not sure exactly where Christie worked when she wrote her first novel. It might have been at home or a quiet library.
Taylor Swift wrote 'Love Story' at the age of 18. It was a breakthrough song for her and became a huge hit. The song showcases her songwriting talent at a young age.
Taylor Swift was around 18 years old when she wrote 'Love Story'.
I'm not sure exactly how old Paul Jennings was when she wrote Spookiest Stories. You might need to look up specific biographical information to get that detail.
Taylor Swift wrote 'Love Story' when she was 19. At that age, her songwriting skills were already remarkable, and this song became one of her most popular hits.