Unique and interesting concept. My non-spoilery review will be posted on BookNerdsAcrossAmerica.com. 
 One thing bugged me. 
 (view spoiler)[ 
 The story flow was a little weird to me. It seemed like we're just chilling learning about the children and the loop and peculiars in general, then all of sudden -- wights and hollows! They aren't even talked about until 2/3 into the book and then suddenly they are the reason for EVERYTHING. Everything you just read about is because of them. And from that point on, the rest of the book was about them. I don't know...are they really necessary? It seems like we're just going along with this unique, interesting story and then all of sudden it's just about monsters. 
 Maybe because I had a hard time with the story behind them. Here are these horrible monsters that eat peculiar blood. No wait! Now they eat human blood, too, if they can't find peculiars! Maybe because the first time of the book had a romantic quality to it and then enter the monsters and now all darkness and gore. We don't get much more about the children, their relationships, their life -- all of a sudden it's all monsters! 
 On a slightly lesser note, I really need Jacob and Emma not to hook up. Dude, she hooked up with your GRANDPA. 
 (hide spoiler)]