Celestine's character really developed! Her mentality completely changed from when we first met her in book 1, she was the person who believed in the Flawed system. She was a model young girl so when she became a Flawed her whole world went upside down and it took a while for her to stop seeing the world as the old Celestine. 

Loved the romance! The connection between Carrick and Celestine is based on the fact that they were there for each other when no one else was. They've witnessed each other's worst moments and Carrick's character was also more developed in the book thankfully because i didn't really have enough to judge him on in book 1.

Great world building with the politics and media! Compared to other dystopias, this series is not physically violent in terms of wars and battles but the things happening are still horrible. Much more cruel than a mere battle with guns so there were times where i just had to put my kindle down.For example if you lie, you get branded on your tongue with a hot poker in the form of an "F" for flawed. Each crime corresponds to a specific branding area and the maximum amount of brands for a person is five-or so they say. Then we have F.A.B children, kids that are Flawed At Birth because they were conceived by two flawed parents. This kids are taken and put into institutes where they are brainwashed into hating their Flawed parents. And after leaving the institute, they can't try and find their parents or else they become Flawed too.

What i really liked about this book was that the author kept the plot simple without too many complications that would make it hard to understand. I had that problem with Mockingjay and Glass Sword...i was just completely indifferent to the wars and the political problems because it was complete chaos and I just lost complete interest! In this book the author stuck to one plot and followed it through to the end! It still amazes me that this simple plot went as far as it did-just genius!

I can't give it 5 stars because even though i enjoyed it, it's not an all time favorite! But it was still excellent! And a downside was the predictability of the ending...i already knew somehow what would happen.