Insurgent - Veronica Roth

I just started reading Insurgent, which is the second book in the Divergence series and it is already just as good as the first book in the series. And I already notice that Veronica Roth uses a large variety of sentence structures in her writing, such as really short sentences like "So I agree" (Page 32). Which add a lot more emphasize on those sentences and she also used much more complicated sentences when describing some things like "It is large and open, with black-and-white cloth draped on every wall, and a circle of podiums in the center of the room" (Page 228). This kind of sentence goes into deep detail about the description of the room and really paints an image in your mind of what it looks like. 

In the book there has been an all out war between the factions and Erudite is at the helm and they have been using serums to put people into simulations so that they can do their dirty work for them, but in the book there are people that can resist these simulations and they are called "Divergent". So with those who are Divergent threatening the Erudite's plan they are trying to kill them all, but they are also saving some and taking them back to the Erudite headquarters which is making me curious what could they possibly want from them? Do they think they can get information from them or learn how their unique traits work, with all these open ended questions that seem to be piling up faster than they are being answered I can't wait to keep reading to find out what will happen.