This is the worst book I've ever read: so fake; not one convincing thing happens, it's all so unbelievable, especially from the middle on to the end. I was willing to give it a chance, (the beginning was pretty compelling) but it quickly went from 3 stars to 2 to 1.5 and down. 
 Until the end, this was more a mystery than thriller, with the main character Libby trying to find out what happened that night when her family members died. There are a lot of boring stretches where Libby is driving through shabby towns, with over-done descriptions of the shabbiness and ugliness (we get it--all the characters are poor and shabby, you've set the tone many times over, just get to the action), and talking to people, finding out stuff. 
 When the who-dun-it was finally revealed, it's just so dumb; (but by that point I knew it was going to be dumb because the whole book is dumb). Flynn wrote this before Gone Girl, and Gone Girl is much better because you can actually believe it could happen, the characters in Gone Girl are believable. 
 How are they making a movie of this? I hope they change the plot and improve it (not that I'm going to see it). 
 Read for bookclub at SFVpl.