I love The Kite Runner, even though it may be a bit mature for freshman English. It has some controversial things in it which some parents might not want their freshman-aged children to read. :x
Other than that, I suggest The Book Thief. Its an excellent book about a youg girl living in Nazi Germany, rebelling in her own way. She lives with an adoptive mother and father, as her parents were sent to a concentration camp (Communists), and its about her day-to-day struggles in a war torn town/ country.
Not to mention its entirely narrated by Death.
I love that book.