I had to sit on this one for a bit after finishing it.  The first 1/2 of the book was damn near creepy perfection.  I loved it.  Unfortunately, it had pacing issues in the second half that caused the story to become so disjointed to me, but it didn't feel intentional.  I'm definitely interested and plan on picking up other works by this author.  The writing and premises of this was good, and I think I'll end up reading a 5 star book by Marshall.  It feels inevitable.