"Speaker For The Dead"

Graff was tried in court, trying to prove Ender was a killer. Ender finds out he killed Stilson and Bonzo, and is hurt from how nobody cares about all the buggers he killed, since they are both the same to him. On Eros, Ender tries to help, but the people around him see him as useless during peacetime. Valentine then tells Ender that he can't return to Earth, since Peter is in control of it, and he would use Ender. She wants Ender to come with her to the bugger worlds. He agrees because he wants to learn about the buggers' past, since he starts to distrust Valentine because he thinks she's trying to manipulate him. The colony, sent there to populate the bugger worlds, with Valentine and Ender, settle down, and while looking for somewhere to settle, Ender runs into landscape from the mind game he played in battle school, with the giant's drink and the room with the mirror. Behind the mirror, Ender finds a pupa of a queen bugger, and it communicates with him, sending him mental images of the battles, and of what he has to do for him to start a new bugger population. He realizes that the buggers found out his thoughts from the ansible, and that they didn't know human beings were capable of thought, and when they did they stopped attacking. Ender writes a book explaining the bugger story and how they really wanted to live together in peace with humans, under the pseudonym "Speaker For The Dead". The book becomes a center of a religion on earth and the colonies that the buggers used to live in, and Ender comes to Earth to see Peter, and he tells Ender his story as well, which goes into another book, and the two books are the basis of the religion. Ender convinces Valentine to fly with him to different worlds, to find the right place to start a new bugger civilization. 

While reading, I noticed that Valentine explains that people are always manipulated, but all they can do is choose which way to follow. This means that nobody really lives their own life without being influenced by another, which is being manipulated, in a sense. Ender gets his freedom, by deciding to go on a mission to start a new bugger civilization. This is because he feels obligated to make up for his wrongful doings of destroying the buggers, even though the buggers don't blame the humans for it.