Insurgent - Veronica Roth The second book in the trilogy does not disappoint. It's fast paced, Tris continuous to be likable most of the time something strange since I didn't like the heroines in the dystopian novels I've read and Four... well Four, though an asshole sometimes, is still Four...
The only drawback in my opinion in the series is the feeble world building. I certainly don't like the stretching details, but I would have like to know more about the setting.

The end, although I had guessed it pretty early, was still quite shocking. It a cliffhangerly (is that even a word?) end but you will be able to sleep at night.
( Note to self: Stop thinking about the next)