The Woman in White" by Wilkie Collins. The better sort of Victorian melodrama, and usually classified as one of literature's earliest detective novels. I'm enjoying it, but my reason for selecting it is mundanely economic: English language literature here is hard to come by and grossly overpriced, but this book (a Penguin Popular Classics edition) has a torn cover and some marks of being "foxed", and was on special offer at half price (still considerably more expensive than it would have been in Britain).