4.5 Stars.This book is so well written and filled with interesting characters and a plot that moves smoothly & swiftly. I really loved how Ms. Halle did a wonderful job of making us understand what the character was feeling and see how over time she had to change herself in order to survive.Ms. Halle switches back and forth between Ellie and Camden's POV and she does it fluidly. The switches were perfectly timed to keep you riveted and rushing to get answers to questions as fast as they could pop up. As the story progresses, it becomes an entertaining ride alternating between the characters point of views. 4.5 stars read for me!