Not the best book by Kingfisher but entertaining enough. There are a lot of Lovecraftian vibes around, like the horror and menace that can't be described but that it's always there, and, story-wise, it was a good story.
I felt, however, that it stretched a bit too much across the pages with content that didn't really benefit the book, but that's just me.
I noticed, tho, that towards the last third of the book, the main character started using the same expression for most of her thoughts; she almost always started with 'Hell, ...' and it ended up being a bit off-putting since it took me from the story.