Old Man's War, written by John Scalzi, is a thrilling space war science fiction novel. The story takes place in a future where elderly people are given the opportunity to join the Colonial Defense Forces, a military organization that protects human colonies in space. The protagonist, John Perry, enlists in the CDF and finds himself in the midst of an interstellar war against various alien species. Old Man's War combines action, humor, and thought-provoking ideas about the nature of war and humanity.
