Retrograde Interrupt. Star Ascension, #9

Thousands of years after humans ascends to the stars, a tyrant captures a thousand worlds. Humanity spread across vast stretches of space, yet Varjo Kuolema conquered every human held world with ease. Now he and his twelve Bishops sit upon their thrones like malevolent gods, ruling over the human race, their iron grip unbreakable. Or so it seems. An ancient warrior, called from the grave.A backwater world police detective with a secret, forbidden skill.An agent from the exiled Shepherd Clans.Detective Jal Nerio finds himself pulled into a storm of violence and intrigue, on the trail of a relentless being.
One determined to hunt an empire to extinction. But Jal soon finds the fate of an empire is not his biggest problem. The first book in the epic seven book arc of The Hunted Empire.