This book is the second book to the "The 5th wave" book series. In this book, Cassie, Ben, and others are searching around the remaining humans for allies, but it was hard to trust anyone anymore after the 5th wave. I like the way the characters interacted with each others like how Ringer talks to Teacup by sometimes scolding her but still cares about her. I also liked the fight scene when they used cool sci-fi weapons like alien bombs or other advanced technology. While reading the book, I feel that I can sometimes relate to Nugget because he was in an unfamiliar face and is scared. Sometimes when I go to summer camps, I might feel nervous or even scared because I don't know anyone there and don't know what to expect of them, so I feel that I can relate that part to Nugget, or Cassie's brother. I would recommend this book to others who liked the first book "The 5th wave" and I would rate it 4.5/5 stars.