I haven't seen this mentioned here yet, have others read it too?
It's by Michelle Paver, author of Dark Matter and Thin Air, though Wakenhyrst is set in England, just before WW1 and concerns demons.
It's very much a "gothic horror" though I wouldn't say it's particularly scary (unless I don't scare easily?). It provides more a sense of creeping dread, which I thoroughly enjoyed!