Bunker Dogs is gripping in the best of ways. It's the perfect sort of unsettling from the get-go and still Greenwood manages to turn the story on its head. Definitely recommend starting this if you're a horror fan!
At face value the story concerns Louise and her ensnarement in the convoluted web of Adele and David Martin's crumbling marriage. Adele becomes Louise's best friend while David becomes Louise's lover.