John Norman 
King 

A science fiction series filled with interplanetary adventure, rebellion and mortal combat by the author the The Gorean Saga. Third in the series, The King. This is the age of the Telnarians. Their vast, corrupt empire spans galaxies, ruling by terror, slavery, and the lash. But, their corruption and brutality could spell their downfall for, on a thousand worlds of swords and science, the savage souls of true men will not be forever chained. A heroic tide is rising–and one warrior is born to lead the barbarian horde. To recruit his legion of space barbarians, the giant gladiator Otto must win their fierce loyalty, world by world, in lethal combat against monsters, men, aliens, and the beautiful, murderous slaves–while Imperial conspirators plot Otto’s assassination, and an evil warlord’s brutal army prepares to unleash genocidal horror across the stars.