I waffled a little about what to rate this, but ended up going with 4 stars. The story was decent, but the real star of the show is all of the lovely old photos. They're gorgeous and creepy and I loved them. That being said, I didn't think the story was anything super special or amazing or new, but it was enjoyable. 
 One of my major issues with the story is that it most definitely feels like it was written around the pictures and to fit the pictures. It was also a bit slow moving at the beginning (it took me forever to get through the beginning and I am by no means a slow reader). The stuff with Emma was a little weird too, all things considered. 
 The good stuff... Even feeling as I do about the way the story was written, I still very much enjoyed it. There was a bit of time travel-ish stuff going on, which I thought was well done (I'm weird about time travel. I feel like it's usually done really poorly). I loved meeting the children themselves - they were interesting and fun. And the book itself is just absolutely gorgeous. 
 I'm not sure how I feel about the ending. I assume there's going to be another book, but I don't know that definitely. I feel like everything could have gotten resolved if the book didn't take so long to get going.