Mankind's Ten Thousand Worlds has expanded and prospered until they encountered their first aliens. These were people, almost as human as those who had originated on earth, but with some slight differences. One of their differences was that they would never associate with aliens, never surrender, never compromise. They would conquer the Ten Thousand Worlds - or die trying.
Used availability for Katherine MacLean's Second Game
May 1981 : USA Mass Market Paperback