I'm sure by now you've read it, or at the very least you know what it's about. If not, you can find a more detailed synopsis elsewhere, I'm sure. This isn't called a Busy Mom Book Review because I have lots of time on my hands.
I will tell you this:
Folks in the book are one of five types of people, and you forsake your family to live with other people of your type when you come of age. If you test out to be more than one type of person, you're in big trouble, baby. So don't tell anyone.
I borrowed this one from my niece, so yes, it's another teenage dystopian-themed (hey Blogger! Get a better spell check. Or, he Wikipedia! You spelled dystopia incorrectly. I'm on Wikipedia's side, but hey, it's kinda hard to ignore that stupid red squiggly underlining, too) story, but no, there aren't any vampires. Just a community of adrenaline-addict goths. Or punks. Let's just go with adrenaline addicts.
Bottom Line: I loved it. It felt a bit simpler in construct than The Hunger Games trilogy, but it was still well written, and I felt like I was invested in the people in the story, and I really wanted to find out what was going to happen next. Worth it, and probably worth it in any form (real paper or e-book); the deciding factor on that would be price and your form preference.
Now I just need Insurgent. And maybe my own copy of Divergent.
I have to return my niece's books. I do. I really really really want this series in my library, though (in real-book form). Maybe she won't notice.