The Inquisitor Cycle

A Polish book series written by Jacek Piekara revolving around the adventures of Mordimer Madderdin, a Inquisitor of the Holy Office. In this universe, Christianity took a radical turn where Jesus Christ didn't die for our sins, but became a ruthless warlord that conquered the Roman Empire by force and since then, the world has been ruled by the Inquisitors. Mordimer is a rookie Inquisitor that just acquired his license to operate, considers himself a man of faith, a servant of God and a hammer of witches. Soon he becomes involved in political intrigue, conflict with the forces of darkness and the enemies of the Empire.