I was lucky enough to find an advanced reader copy of All the Dark Places, though I didn't get a chance to read it until now. It was a very interesting novel, full of twists and turns. Unlike most mysteries, the twist at the end wasn't as unexpected as it could have been (the hints were there, this reader simply missed them). 

There are numerous stories tucked into each other - Molly's horrifying backstory, the girl who was murdered in New Hampshire, and how it connects to Jay's murder near Boston - and each is connected to the others. It was a good murder mystery, and I'd be interested in seeing what the author does next.