I have to say I was really surprised by the ending of this book. I did not see that coming. I suspected Tris would do A but was a somewhat shocked when the result was B. (I can't say more without ruining it for others so A and B are what you get.)
I enjoyed this series. Like all the dystopian novels for young adults, this one takes a hard look at how we treat people, what we do with our resources, how we move forward, and there's always a little love interest or two thrown in to keep it interesting on that level.
5 down plus 47 to go.