At a normal walking pace, it would take around 20 minutes to walk around the 27-acre square field. If the 27 acres are in any shape more rectangular or irregular than a square, it will take longer to walk around.
Hosseni wrote The Kite Runner to show the world the way that common issues of identity, assimilation and power are carried out in his culture in Afghanistan. He spends a great deal of time developing Amir and showing how he comes to a self-identity by the end of the book.
In that sense, it is a groundbreaking work. I would certainly label Khaled Hosseini's book, The Kite Runner, as a fiction novel. More specifically, it should be categorized as historical fiction, since many of the events were based on the real-life experiences of the author as well as the nation of Afghanistan.