Dramatic irony - Sara being alive in Homeland
The sequel starts off with the tragic revelation that a lot of the protagonists from the previous novel, died or were taken up by the virals. One of them is revealed to be Sara, Michael’s sister and Hollis’s wife. Midway through the novel, it is revealed that Sara is alive and was taken to the Homeland. The rest of the main characters aren’t aware of her being alive, so this makes for a dramatic irony of the novel.
Situational irony - Lila delivering the final blow to the twelve
While it is through Amy that the final pieces are put together and the twelve originals gather in one place at the stadium, it is Lila who delivers the final blow by sacrificing herself and Grey, by igniting the fire underneath. Lila is shown to be the unaware antagonist of the novel, so this outcome with her character is unexpected and creates situational irony in the novel.
Irony of Horace Guilder
Horace Guilder is the main antagonist of the novel. He is a cowardly, self-absorbed and psychopathic character. He expects gratitude from the citizens of Homeland, while manipulating and exploiting their lives. At the end, he is destroyed together with Grey, while being called a betrayer by the twelve, whom he devoted a century serving and creating a safe place for, after they destroyed most of the life on earth.
Dramatic irony - Amy’s great plan
It is clear throughout the novel that Amy is planning to make a huge sacrifice for humanity, communicating with the spirit of Wolgast and getting into contact with Carter. Peter and the rest of her friends are unaware of the truth behind her plan until the very moment of her transformation into a viral. The reader is aware of Amy’s intentions while the characters aren’t, which makes this a dramatic irony.