All 6 Old Man's War books listed in order of date published, and chronological order.
What is the Old Man's War book series about?
The "Old Man's War" series by John Scalzi follows John Perry, who joins the Colonial Defense Forces on his 75th birthday, gaining a young, enhanced body to fight in interstellar wars. As Perry navigates the complexities of alien conflicts and military life, he discovers deep truths about humanity, survival, and the ethics of war.