Rationale

The main focus of this letter is about the regret of Amir because of the revenge he made to Amir, trying to solve that problem and to not ruin their friendship, also telling him about what was going on in his head when he did that type of revenge to Hassan and that he felt guilty and stupid about it. In the next paragraphs, I wrote about de life of Amir in America, what he was doing and when he met his love, or in another word, his actually wife. 

The letter is based in the "mission" to reunite the friendship between Amir and Hassan, but it could be easily read or understanding by any reader. This letter as we can see, is obviously to Hassan, his old friend that separate their life when the father of Hassan decide to leave the house.

This mainly letter is based in different chapter of the book but always focus in Amir and his life, basically, telling his life in America and the regret of the act to Hassan, trying to fix it and to get in touch with his old friend.