Empire of silence
(Book)

Lexicon included.

It was not his war. On the wrong planet, at the right time, for the best reasons, Hadrian Marlowe started down a path that could only end in fire. The galaxy remembers him as a hero: the man who burned every last alien Cielcin from the sky. They remember him as a monster: the devil who destroyed a sun, casually annihilating four billion human lives--even the Emperor himself--against Imperial orders. But Hadrian was not a hero. He was not a monster. He was not even a soldier. Fleeing his father and a future as a torturer, Hadrian finds himself stranded on a strange, backwater world. Forced to fight as a gladiator and into the intrigues of a foreign planetary court, he will find himself fight a war he did not start, for an Empire he does not love, against an enemy he will never understand.