Old Man's War

Joining the army is not usually what people do on their 75th birthday, but John Perry isn't like most people. In a world where interstellar space travel is possible, humanity is fighting for planets to live on, and aliens are willing to put up a fight. So, John decides to join the Colonial Defense Force to not only defend Earth but to potentially own a piece of planetary real estate. But the war far from Earth is brutal, and John soon realizes that it's much harder than he ever imagined. Old Man's War is a thrilling sci-fi story that explores humanity's quest for survival in the vastness of space.