I read a book sometime ago that I think would be perfect for my daughter now but I cannot remember the title or author.
The story involved a young woman who solved the mystery. It was set in the 1800s (?), something to do with a photography business, a factory that makes guns and arms (but shouldn't be). I remember it being fantastic and have an image of the factory as if it was some steampunk masterpiece - please help if you can. Thanks.