The Last War — Peter Bostrom

Earth is under attack.

20 years after the American-Chinese war devastated our worlds, we finally have a tense peace. But legendary American Admiral Jack Mattis, on his inspection tour of the first joint American-Chinese space station, finds himself in the middle of the unthinkable: an alien invasion.

Their ships are powerful, their weapons overwhelming. And in the confusion, our tentative peace with the Chinese is shaken to the core.

Taking command of his old battleship, The Midway, Admiral Mattis races the alien fleet to Earth, desperate to prevent the utter destruction of humanity's home. And in Earth's darkest hour, Mattis must unify and lead old adversaries to the fight against a common enemy, one that doesn't care about flags or borders. An enemy driven by malevolent hate and a thirst for blood. An enemy that cares for one thing only: Earth's destruction.