I gave this book such a low rating because, to be honest, it really was just okay. And that's not even taking into account the ending, which I HATED. I'm gonna have some spoilers in here, so, you've been warned. Alright, so a small group of rebels called Allegiant make it out of the city and what they find shocks them. It is not the war-torn apocalyptic place that Edith Prior made it out to be. Instead they find a compound and learn that there are more test cities besides theirs. They know they must do something, and, well, let's just say that at one point, everyone's mad at Tobias, so then they make a plan with some other people to tell their whole city the truth and take away the compounds power. Part of their plan is that someone has to go on a suicide mission to get a serum. Caleb volunteers to try to make it up to Tris after he betrayed her. But Tris forces him to let her take on the mission. And here is the part when I freaked out; Tris died. TRIS DIED!!!!! At first I was thinking, this has to be a mistake. How are they going to make her come back to life? And then they told Tobias and I was like, this is permanent?!?!?!?! I've got to give Roth some credit. Actually killing the main character is definitely original and outside the norm. Nevertheless, I hated the ending. With a passion. It's just... Tris and Tobias were such a good couple!!! Anyway, I guess I'd recommend reading the first two books and then imagining and ending rather than reading this book. It will be easier on your tear ducts.