The End of All Things by John Scalzi
If the enemy of an enemy is a friend, then two space empires, one human and one alien, should work together despite their differences to prevent a war and save Earth. Readers of Scalzi’s science fiction space operas may be familiar with the alien Conclave and the human Colonial Union. Familiar characters are joined by pilot Rafe Daquin, who has to think his way out of a terrible situation, and Lieutenant Heather Lee, whose paratrooper forces are tired of visiting planet after planet to keep the peace. Exciting and thought-provoking, this book is darker in tone although less violent than other books in the Old Man’s War series; a satisfying read. Old Man’s War is the first book in the series, one more book is planned.