The Praxis (Dread Empire’s Fall, #1)

A young Terran naval officer marked by his lowly birth, Lt. Gareth Martinez is the first to recognize the insidious plot of the Naxid -- the powerful, warlike insectoid society that was enslaved before all others -- to replace the masters’ despotic rule with their own. Barely escaping a swarming surprise attack, Martinez and Caroline Sula, a pilot whose beautiful face conceals a deadly secret, are now the last hope for freedom for every being who ever languished in Shaa chains -- as the interstellar battle begins against a merciless foe whose only perfect truth is annihilation.