A great, creepy, supernatural thriller

Maybe I'm a harsh critic or hard to please on the horror front but I feel this that this, along with other books recently, has been categorised as horror when it really isn't. There are acts of horrific behaviour, ghosts and supernatural goings-on but, to me, those alone don't qualify it as horror; it's a supernatural thriller, albeit a good one. That's the gripe out of the way. Carson has written a hugely enjoyable, terse story with some which slowly tightens the screw on the reader in terms of heightened stakes and increasing tension. The isolation of Torrance in the Catskills is nicely done; it's remote enough to harbour such malevolence yet close enough to NYC to trigger a domino effect to cripple that city. He seems to have done his homework on dams as the reader is kept well informed without it being at the expense of the pace or the narrative. He's also not scared of following though on the story's threat and unleashing disaster; a wonderfully written section which hops from location to location introducing us to new characters marvelling at the first sunset in nearly two weeks as the rain finally relents, only for it to be a dark portent and sweep back through those same locations as disaster befalls them. Not particularly scary but very enjoyable. I hope there's more to come.