First of all, A Series of Unfortunate Events is classified as a children’s book so it’s obviously meant for children. It does have some dark themes but when I read it back in 3rd grade, I did not care much about the gothic theme – to me it was just an adventurous book . Personally I think it’s okay for a child to read such books. As long as your daughter likes the books, you should let her read it because hopefully if she likes this series she will continue reading more books in the future ( in a society where people are reading less and less)