4.5 stars 
 this book was incredible! I loved it way more than I was expecting. the suspense and the plot twists here and there (I totally saw *that* one coming!!) kept me turning pages so quickly, I couldn't put it down. and I loved how well all the characters fit together! the alternating POVs was a bit confusing at first, as I couldn't tell when it had changed/who to, but once I got the hang of each characters voice and storyline it got easier. 
 this is the first book I've read with "aliens" and it was great!