Okay, I finished Divergent and Insurgent in less than a week and couldn't put them down, so it is NOT FAIR that the third book in the trilogy isn't scheduled to come out until the fall of 2013!
Anyway, Insurgent picks up where Divergent left off, with the hunt for the Divergent going strong. Tris (Beatrice) and her Dauntless trainer/boyfriend Tobias ("Four") find themselves going on a wild and dangerous journey, through several other factions' headquarters in order to save the Divergent and the society as a whole.
Jeanine, the evil leader of the Erudite faction (the faction who values knowledge above all else) is hot on their trail, though, seeking to do cruel and dangerous experiments on them to figure out exactly WHAT being Divergent means and what it does to them.
Tris and Four band up with a group of factionless and vow to overthrow Jeanine and her lackeys while saving their society. Along the way, they meet back up with Tris's parents, her brother, Caleb, - an Erudite transfer - and Tobias's family. Will they prevail?
The novel was fast-paced and action-packed. I don't know why I thought about it more with this novel than the first, but I found myself constantly wondering which faction in this society I would align with if I'd had to choose. I'm still not sure. Like Divergent, it did have some more mature themes and scenarios, so I'd still recommend it to older 7th and 8th grade readers.