This is not YA. I mean, it is in the sense that it's about a girl and she is in her teens and it's comprehensible to young adults, but this book is in the grand tradition of the gothic novel, updated for contemporary sensibilities and morals and it's so good.
There's a point in her books where the text shifts from crafting the atmosphere and background to setting off the plot and then it's impossible to put it down. So I didn't.