I just had to post on this thread. My grandparents loved books and used the library a great deal, and bought loads second hand. Us kids had free rein of them, and no-one told us anything was 'unsuitable'.
To this day, my cousin, my sister and I love Victorian melodramas and crime stories. The Woman in White is my absolute favourite - I first read it aged about 11 or 12, and spent ages working out the timeline!
I always say that it has 2 of everything: 2 heroines, 2 villains, 2 villainesses, 2 victims, 2 detectives, and, if you count Pesca, 2 heroes. Marian is one of the first (maybe THE first) woman 'detective' . It was very forward for its time. This is a decent adaptation, so far, especially Marian, not an easy part.