I give it 3 stars because I always rate book based on a personal appreciation, but I have no trouble understanding a four stars rating for this book. It was a bit light and easy going for me, but it well written and have a good ambiance of Victorian era with some romance and some mysteries. I like mysteries to be darker and this one wasn't really. So a good book, if you like slow pace and soft mysteries and this old London vibes you should have a look. Good book, just not my style!