Does Amir redeem himself at the end of The Kite Runner by Khaled Hosseini?

Khaled Hosseini's novel The Kite Runner revolves around the sins and guilt of its protagonist, Amir. In his childhood, and at the beginning of the text, Amir witnesses the rape of his friend Hassan during a kite running contest. Hassan is raped because he refuses to give up Hassan's kite to the local bully when he is running it in the kite running contest. Amir says and does nothing to prevent the rape. In his confusion and shame, he rejects Hassan. Amir lives with this guilt for the rest of his childhood, and it ends up shaping many of his adulthood decisions. 

At the end of The Kite Runner, Amir has rescued Hassan's son, Sohrab, from sexual slavery. This rescue causes Amir significant physical, mental, and fiscal sacrifices. It's not until the final scene, in which Amir runs the kite for Sohrab, that Amir finally redeems himself. By making the decision to assume Hassan's role, Amir absolves himself of his childhood prejudices and sins.