Others have said they did not like this book as much, but whereas I have felt previous books were starting to drag a bit, I thought this one really picked it up. It's not perfect-- I do wish the idea that A was making them so paranoid they began to mistrust everybody was explored a little more, but I'm curious to see where that may go in the next book. 
 Some of the girl's decisions do strike me as very poor decisions (i.e., Spencer, what the hell were you thinking?) but given that this story doesn't at all resemble the normal life of a teenager, I'm willing to let that go.