This solidified that I am not an Alice Feeney fan.  The twist, while shocking (sure), was convoluted and largely unbelievable.  A good twist is lovely, but not when it's so far-fetched.  

There were a few redeeming parts of the book that I would give 3 to 4 stars towards the beginning and middle.  The ending lost me.

I'm apparently just not a fan of these (incredibly popular) types of thrillers.  Weak characters, flimsy plotting, and the wacky twist that felt so bizarre and unbelievable - overall 2 stars.