This is how you end a series! I was actually very surprised at the lower rating on here, but I can understand why. This is one of those books where you will either love it or hate it because of how it ends. I will warn you now, the ending is very open-ended. Everything is resolved, but Ms. Charbonneau ends the novel in a way that there could be a possibility for either another book or a novella. Nevertheless, I felt this was a fantastic ending to this series. The novel is packed with tension, action, and non-stop heart-pounding moments. 
 One of my favorite things about this series has been watching the progression of Cia's character. In The Testing, Cia was very timid and not willing to stick up for herself. She didn't have that fight in her. But by the end of that novel, you could easily tell there was much more to Cia than we first thought, and she was definitely going to prove everyone wrong. In Independent Study, we saw a very nice growth in her character, a growth that not many heroines experience. While in some ways she was still that timid Cia, she was also a very strong young woman. However, in Graduation Day gone is the timid girl that doesn't have any fight. Cia is stronger than ever, and willing to fight to end the Testing, even if she has to do things that she never thought she would do. Cia greatly steps up in this novel, and it was extremely refreshing to witness. Ms. Charbonneau has done a remarkable job with her character, and it shows just how great of an author she is. We have watched Cia go from girl to woman in the course of 3 books, and that is fantastic and exactly what I want in a book. Tomas is loveable as ever, and one thing that I greatly appreciated about this series in general is that their romance never overshadowed the story. Ms. Charbonneau has created such realistic characters; ones that show how the events of this new world shape and alter their personalities and rock their core beliefs. The characters are forced to change because of the events of the books, and sometimes not for the better. 
 The action is extremely intense throughout this entire book, and there are many heart-pounding moments. The book hurtles toward an extremely shocking and unexpected ending, and it is an ending that you don't want to miss out on. Everything is revealed, and you will be completely blindsided. Of course with all this action, there are many deaths. While some of the deaths were expected, there were a couple I was definitely not expecting (but none are too heartbreaking). 
 As with many dystopian novels I have read, *cough*The Hunger Games*cough*, the last book was such a disappointment. And I was worried that the last book in The Testing series might fall into the same rut. However, I highly recommend reading this novel if you are a fan of the series. As I said earlier in my review, the ending is open-ended, but at the same time, it is perfect. Ms. Charbonneau will sweep you away into the Tosu City, and you will never want to leave. I honestly hope that she decides to write either a spin-off series or just another novella because I would love to know what happens after Graduation Day. Definitely check this novel out because you won't be disappointed. Happy reading :)