This is a tough one to rate, and even to shelve here on Goodreads ... I'd just given the book/blurb a quick look and didn't exactly know what I was getting in to. It was NOT what I was expecting. I think I was expecting something quirky/cute ... this was not that.  And I'd just read [book:The Quiet Tenant|61897971] and this was much too close reading these back to back, with such a similar subject (a woman being held captive for years). 

Part 1 - all the chapters are from Sally's POV. In Part 2, the chapters switch between Sally and Peter, with Peter's POV starting in the past (1974). This was a bit confusing at first, but it all came together. A new(male) narrator was introduced for the Peter sections. Not really sure what differentiated Part 3 from Part 2 (we do get Sally/Peter together, but not right at the start of the part). 

This was compelling and twisty and dark -