Warhammer 40k: The Men of Iron Return to the Galaxy

"In the grim darkness of the far future, there is only war." Forty-two millennia have passed, and now the Imperium of Man stands upon the precipice of oblivion. The galaxy is a slaughterhouse, and humanity’s fractured dominion is held together by little more than faith, hatred, and the white-knuckled grip of desperation. It is an age where the stars themselves seem to bleed. The Imperium is besieged on all fronts: savage xenos tides crash against the walls of civilization, the insidious rot of Chaos gnaws at the souls of the faithful, and within the gilded spires of Terra, corruption and betrayal fester like a gangrenous wound. The ancient sins of the past, the dread Men of Iron, those soulless abominations of steel, were thought cast down in the fires of antiquity, their metallic echo silenced by the blood of billions. They are a nightmare forgotten, a heresy expunged. Or so it was believed. From the dust of the Dark Age of Technology, a relic stirs. Axion. An intellect of godlike strategic calculation, a cold sovereign of war, has been roused from an aeons-long slumber by the careless hand of fate. He is a ghost in the machine, a weapon of a lost age reborn into a galaxy of madness. Now, the sleeping giant awakes. Inevitably, the gravity of total war pulls him in. No longer a silent observer, Axion is thrust into the Great Game, a singular point of logic forced to navigate a universe set aflame by the insanity of gods and monsters. — Description from novelcodex.org