Armor, written by John Steakley, is a gripping space war science fiction novel. The story follows Felix, a soldier who becomes a part of a military unit known as the 'Legion' to fight against a relentless alien enemy known as the 'Ants.' As Felix battles the Ants, he also struggles with his own inner demons and the psychological toll of war. Armor combines intense action sequences with introspective character development, making it a compelling read for fans of space war science fiction.