I’ve read 7 of Coates's other books, and unfortunately this one was disappointing. The first third is extremely slow (I almost gave up) and the twist was predictable. The next third of the book is just odd. I had high hopes for the ending to make it all worth it, but unfortunately it didn’t.
If you are new to her books and looking for something truly scary, I suggest Gallows Hill or The Haunting of Ashburn House.