Win a copy of Head On 2014! National Geographic Channel

Australia's largest annual photography festival and second largest in the world, Head On Photo Festival returns to Sydney, showcasing the work of international and local photographers. National Geographic Channel is giving you the opportunity to own a copy of the Head On 2014 book which features stunning images from the 110 finalists. For your opportunity to win, simply answer the question below.
Tell us in 25 words or less, who is your favourite photographer and why?