Have you read the book The Kite Runner? How do you feel?

The Kite Runner is written by Khaled Hosseini.
Definitely, Hassan is the most loyal friend of Amir's, always helps Amir out of trouble and never considers of any compensations.
I like the kite fighting tournament very much, and this is the bightest part in the book, in my opinion, during the competition, Hassan and Amir, they behave like heroes and try the best to win.
But they belong to different classes in the society, they have different life tracks.
When I was reading and found out that they were half brothers, I was shaken seriously and my heart was broken for them, how could it be possible? If Amir had known the truth many years before, life should have been totally different. How could it be? I thought and thought, life was unfair and too cruel to them.