Old Man's War - Away from Earth, war continues for decades:…

There are two news. The good news is that humanity has finally reached the stars. And the bad news: there are few planets suitable for life, and there are many alien species ready to fight for them. Away from Earth, war continues for decades: brutal, bloody, unchanging.

Responsible for the protection of mankind, the Colonial Self-Defense Forces do not need young people; they need people with knowledge and skills accumulated over decades of life. John Perry is sure he knows what to expect. But the real fight is much, much harder than he can imagine. And John has no idea who he will become.

In this book, Scalzi confidently sidesteps most of the clichés of military science fiction, creating fast-paced action scenes and paying attention to the science behind his premise.