Complex sentence: He is completing a book entitled "The Long Way Back: Afghanistan's Quest for Peace" for HarperCollins, to be published in September 2011, and is also president of a small startup energy company.
Split into simpler sentences: He is completing a book entitled "The Long Way Back: Afghanistan's Quest for Peace" for HarperCollins, to be published in September 2011. As he authors a book on Afghanistan, he is also president of a small startup energy company.