I found the story of Amir and his history with his servant/friend Hassan to be surprisingly engaging. Hosseini weaves the history of turmoil in Afghanistan from 1964 to 2002 with the story of a young boy growing into a man and makes both accessible.
Amir tells the story in the first person, recounting his boyhood friendship with, and then betrayal of, Hassan with the shame and regret of an adult finally understanding the impact of his actions, but still with immediacy. The story eventually becomes one of repentence and redemption.
Even if you have no interest in Afghanistan, the story is still fulfilling.