Why didn't I read this book as soon as possible? This book is truly a masterpiece! 
 I enjoy the chemistry between June and Day and also their characterization. The action was excellent, and it felt like a movie vividly playing inside my head. But, I wish the author doesn't entirely focus on their character development for all the time. I want to learn about Metias, Thomas, John and Eden more details. Or what motivated the Commander to behave like that. It's just like they were cast off into the story without any reason. 
 I felt the story was okay for me, but nonetheless, it felt a bit sluggish from the beginning. 
 I'm looking forward to reading the next book ASAP. 
 I HIGHLY RECOMMEND THIS BOOK IF YOU LOVE TO READ DYSTOPIAN BOOK, DIVERGENT AND HUNGER GAME.