Insurgent by Veronica Roth (American, 2012)

Summary:
After the events of the first book in the series, Tris, her brother Caleb, Four, Peter and Marcus Eaton go to the Amity headquarters to seek refuge. They are accepted there as long as they remain peaceful. Tris starts having nightmares about killing her friend Will. Soon, an army of the Erudite and Dauntless factions arrive at Amity to look for them, because they want to kill the Divergents. Tris and her friends escape back to the city. Marcus tells Tris that the attack on abnegation was not only to eliminate the faction, but to steal important information that was kept there. 
  
  
  On their way to the city, they find a group of Factionless people, led by Four’s mother Evelyn. Evelyn and the Factionless reveal that they plan to attack Erudite to create a society without factions. Evelyn wants Four’s help to make Dauntless join their cause, so Four and Tris head to Candor, where the remaining Dauntless have taken refuge. The leader of Candor arrests them because he believes Tris and Four were the ones who led the attack on Abnegation. Tris and Four agree to face trial to prove their innocence, which they do by taking a truth serum, but it is revealed that Tris killed Will.
  Another group of Dauntless, the ones who have joined Erudite, arrive at Candor looking for Tris and Four. They shoot needles into everyone’s arms, which injects them with a simulation transmitter, which means they can be controlled at all times. The other Dauntless fight back and the traitors finally leave, but everyone is exposed to the simulation transmitter now. 
  
  Marcus approaches Tris and tells her that he can help her try to get back the information that Erudite stole from Abnegation. This means Tris can once again face Jeanine, the leader of Erudite who is chasing Tris and other Divergents to eliminate them, and maybe stop her for good. Meanwhile, the rest of Dauntless leave Candor and go back to their headquarters. They form an alliance with Evelyn and the factionless, but Tris thinks Evelyn is manipulating Tobias. Finally, the simulation transmitters are activated and Erudite starts making Dauntless members commit suicide until the Divergents turn themselves in, as Jeanine wants them to. 
  Tris turns herself in and it is revealed that her brother has betrayed her and is now back with Erudite to experiment on her. Four is also captured while scoping the Erudite Headquarters to find a target where to attack. Jeanine continues experimenting on Tris, because she wants to control Divergents. Peter, an old friend of Tris who apparently had also betrayed her too, helps her escape with Four. They go back to the Abnegation headquarters, and start helping Factionless plan their takedown of Erudite. Evelyn wants to recruit Amity on their side, but they refuse, which Evelyn sees as treason. 
  Tris and the others finally invade the Erudite headquarters to find the computer that contains the information stolen from Abnegation. They discover that they need Jeanine to reveal that information, but Tori (another Dauntless member) kills her and thinks Tris is a traitor for trying to help Jeanine. Meanwhile, Evelyn wins over Erudite and Tris learns that the Factionless now plan to rule in Jeanine’s place. 
  
  Four finds out that Tris is now held as a traitor, and he forces Caleb to disarm the security system on the computer to get the information she was after. They reveal a video of a woman, Edith Prior, that says that the factions were created as an experiment to get rid of the flaws in human nature and to create Divergents, who have virtuous minds. The video also said that Amity should open the fence forever and allow the population to leave the city if they wanted to. The book ends with the video being shown to everybody in the city.

Another summary:
Tris just killed Will and she regrets it. The Amity faction lets the Dauntless and the Abnegate stay with them as refugees. Tris suspects that Marcus and Johanna are hiding something, and she discovers that Marcus has a secret. Tris finds out that the Erudite are looking for them and they decide to disguise themselves as Amities. The group runs away and arrive with the Factionless who want to kill them until Tobias tell them who he is. Tris discovers that Tobias’ mother isn’t dead and that she is the leader of the Factionless. The Factionless pretend to install a new society without factions. The Truth faction arrest Tris and Tobias because they thought that they worked for the Erudite. They inject Tris and Tobias with the truth serum. Tobias confessed that Marcus and Evelyn were his parents and that he ran away from his father because he was violent. Tris confessed in front of Christina that she killed Will. Tris goes with Lynn and others to the roof and they get attacked by a group of Dauntless looking for Divergents. Eric captures Tris but she had kept a knife and she attacks him. Tobias kills Eric. The Erudite make a simulation where 3 people will kill themselves unless they deliver a Divergent. Marlene dies and Tris goes with the Erudite because she feels guilty. She finds out there that her brother Caleb betrayed her, and Peter is there too but he saves her when they were going to execute her. Marcus tells Tris the secret about Jeanine. They fight against the Erudite and enter to Jeanine’s laboratory. Tris wanted to know the truth from Jeanine’s words, but Tori kills Jeanine, and she thinks that Tris was on Jeanine’s side. Tobias doubts about Tris. Lynn dies. Evelyn starts giving a speech about how she is going to dissolve the factions. They realize that all the Factionless have all the weapons. Suddenly the screens turn on and a woman called Amanda Ritter starts talking. There are terrible images, and she explains that is what humans have done and that’s why they created the factions. Tris understands why Jeanine wanted to keep them inside no matter what. At the end of the recording the woman says her new name, as she is going to forgive everything. Her new name is Edith Prior.

Another summary:
The faction system has been fractured after the attempt of Erudite and Dauntless to kill Abnegation. Candor and Amity have to decide their loyalty. Tris and Co have become fugitives and escaped to look for shelter in the Amity sector. Although Amity proclaims itself as a peaceful shelter and takes them in, a visit from Erudite and Dauntless, traitors, obligues the fugitives to return to the city. On the way back, the fugitives bumped into Factionless, who take them back to their sector in the city, tell them that sectors have unified and in fact, their organization is not as different as the rest of the existing factions: they all live in the same sector, use similar clothes and they even acknowledge a leader of the faction: Evelyn, Johnson Eaton. During her stay in Factionless they discover that her previous faction, Dauntless Loyal, still exists and she stays in Candor. Throughout that time, Tris finds out about Evelyn’s plans to ally with Dauntless Loyal to destroy Erudite once and for all. She also discovers that most of the Divergent population belongs to Factionless. Tris and Co meet with Dauntless Loyal in Candor, where they are attacked by Dauntless traitors for second time, only that they do not carry guns and balls, but radio transmitter that control the population, except, of course from the Divergent. Under Jeanine’s commands, leader of Euridte, and with help from the radiotransmitters, Dauntless must find Divergents and get rid off everyone using their skills to the maximum possible extent, The Loyal Dauntless intervene and frustrate the mission. Four new leaders of faction are assigned: Four and Tori among them. Dauntless Loyal claims her previous city sector; in there, she receives an unexpected threat from Erudite, who activaes a simulation from the distance and “sleeps” three members of Dauntless, making them kill themselves. The only way to stop the slaughter is with the sacrifice of a Divergent. The next day Tris turns to Erudite. In the instalations of Erudite, Tris discovers that her brothers Caleb and Peter, who at the beginning of the novel have escaped with them to Amity, have allied with Erudite. Soon after, Tobias “Four” also turns to Erudite so that with Peter’s help, he achieves to free Tris from the instalations of Erudite. Tobias informs Tris that Dauntless Loyal and Factionless have allied and an attack to Erudite has been planned. Meanwhile, Tris is on the lookout for valuable information. Information that from the beginning of the novel is rumoured about and only exists in Jeanine’s personal computer. During the attack from Dauntless and Factionless to Erudite, Tris and a group of volunteers enter Erudite disguised. Tris arrives to Jeanine’s office just in time to see how Tori, one of the new leaders of Dauntless, kills Jeanine. Dauntless, Amity and Factionless gather in the main building of Erudite. Tori tries to take Jeanine’s place as the leader of factions, but Evelyn, leader of Factionless informs her that the factions system has been disolved once and for all. Besides, Factionless has kept all the guns, making it impossible to declar war. Evelyn takes advantage of the moment to share the information Tris was looking for: a video from a peaceful organization informing that they had been an experiment, the “cure” for the lack of humanity among the population. This was the reason of their existence and the Divergents would be the beginning that their time in the exhile has ended: it was now the time to reinsert to society, further than the wall.

World view: The world portrayed in the story is an hypothetical society which seems to be worse than the one the author lives in.
Future projections: It’s a negative emotional reaction against technological (transcendental, evolutive) or social progress. As such, It shows the horrible consequences of utopia or at least portrays skepticism or disappointment in regard to scientific or technological miracles.
Ideology: The majority is oppressed by a ruling elite or an individual powergroup that come to dominate society to their own interests.
Characters, plot and writing style: The story features a rebellion against the adverse circumstances (revolutionaries may exploit newer technologies for these ends).
Classification: Non-dystopia