It has been five years since I read the first book in this years, Old Man’s War. I probably should have re-read it before I started this. But I did not and so it took a little while to remember the previous book and all the characters and story line that I was supposed to be remembering.
The first book was about humans from earth that when they were near death, were allowed to leave earth and be given new bodies, in exchange for 10 years of service in the military. It was a riff off of Heinlein’s Starship Troopers. It was bleak and a mostly anti-war, war book.
Ghost Brigades is about the second part of the military. Instead of using the minds of the elderly in new bodies, the special forces units are specifically bred as fighting machines. They are still mostly human. But they have been genetically altered and ‘birthed’ as adults. They are kept away from building many real relationships with normally born humans and tightly bonded with their squads.