This was a fantastic second book in the series and I've pre-ordered Allegiant and I can't wait to read it. It's a really good series so far. The characters developed well throughout the book and I like how they both turned out. 
 This series is a must read for fans of science fiction and dystopian novels. It being a young adult book doesn't let it down at all. It's well written and a good plot that keeps you wanting to read more.