Series: The Old Man’s War series

The military science fiction sequel to his extraordinary Old Man's War, John Scalzi's The Ghost Brigades is the second in The Old Man's War series. Who can you trust, if you can't trust yourself? Three hostile alien races have united against humanity, determined to halt our expansion into space. The mastermind behind this lethal alliance is a traitor - Charles...

John Perry was living peacefully on one of humanity's colonies until he and his wife were offered an opportunity these ex-supersoldiers couldn't resist: to come out of retirement and lead a new frontier world. However, once on the planet, they discover they've been betrayed. For this colony is a pawn in an interstellar game of war and diplomacy. Humanity's Colonial...

John Perry did two things on his 75th birthday. First, he visited his wife's grave. Then he joined the army. The good news is that humanity finally made it into interstellar space. The bad news is that planets fit to live on are scarce—and alien races willing to fight us for them are common. So: we fight. To defend Earth,...