J.F. Bone 
Weapon [EPUB ebook] 

In a galaxy torn apart by war, humanity faces annihilation at the hands of the ruthless Eglani. As Commander Alton Fiske sets out on a desperate mission, he uncovers the shocking secret behind the Eglani’s battlefield supremacy. Armed with this knowledge, Fiske must risk everything to turn the tide of the conflict. But even if he succeeds, will humanity be ready for the heavy responsibilities of victory?