Insurgent by Veronica Roth

Insurgent is the second book in the thrilling Divergent trilogy.  It picks up where Divergent, the first book in the trilogy, left off.  At the end of Divergent, a big war has taken place between the factions in the city where Tris and Tobias, two teenagers, live.  There are five factions plus the Factionless, and you will fit into the one that lives by your greatest quality (honesty, selflessness, intelligence, etc.).  Tris and Tobias are both "Divergent", meaning they do not fit into one particular faction because they demonstrate the attributes of several factions.  According to the leader Jeanine of the Erudite faction (the intelligent one), the Divergent are dangerous and a threat to society.  Jeanine also wants Erudite to run the government, not the faction of Abnegation.  This is why a big war breaks out in Divergent.  Tris and Tobias end up surviving the war, and they escape to the Amity faction outside the city where it is safe.  This is where Insurgent picks up.  The two know they won't be safe in Amity for long because Jeanine sends people out to capture or kill the Divergents.  After a few days in Amity, Jeanine's workers come looking for Divergents there.  Tris and Tobias are forced to flee immediately and almost risk their lives trying to escape.  They make it back to the city and visit the Factionless.  The leader of the Factionless is Tobias' mother who he never talks to anymore.  The Factionless want to rise up and rebel against the Erudite to gain control over the government.  Tobias' mother wants to team up with the Dauntless because they know how to fight and all together they would outnumber the Erudite.  Tobias' mother betrayed him when he was little, so he thinks she's just trying to use him and the Dauntless only for her own good.  So, they soon leave Factionless and go to the Candor faction to find the other Dauntless (who aren't traitors to Erudite) who are seeking safety there.  Meanwhile, Jeanine begins gaining more and more power using her dangerous simulations, and she continues killing Divergents.  Tris and Tobias have a close encounter with a Erudite worker trying to capture or kill more Divergents, but they fight him off.  Eventually, the Dauntless go back home to their compound.  The two have another meeting with Evelyn, and she asks the same that she did before of the Dauntless.  Tris doesn't think it's a good idea to team up with the Factionless, but Tobias thinks it would now be a good idea.   Tris is tired of battling the internal conflict of her grief and guilt which began in Divergent and all of the innocent killings happening by Jeanine.  She decides to turn herself in because she is one of the most powerful Divergents.  She is one that Jeanine has been searching for the most.  Tris and Tobias are in love, and Tobias told her not to turn herself in because she would be killed by Jeanine.  Tris ends up going anyway because she is done battling with herself and seeing other people die, even though she is in love with Tobias.  When Tris' death is about to come, she realizes that she does not want to die and she just wants to be with Tobias.  When he tries to save Tris, he gets captured by Jeanine too.  Peter, originally from Tris' faction who then became a traitor to the Erudite, saves Tris' life because he felt that he owed her for previously saving his life.  Tobias then realizes she is still alive in the Erudite compound.  He leads Tris and Peter to safety when they all escape, and then...
(Read the book to find out what happens next!)
I highly recommend reading this well-written, electrifying trilogy written by Veronica Roth.
Click here to watch the trailer of the movie Insurgent.