To Be a Deathstalker — Simon R. Green

Fate has made Owen Deathstalker a rebel hero in an empire choked by tyranny. With his valiant compatriots, Hazel d'Ark and Jack Random, Owen must now bring the uprising to a fiery conclusion. From the rebel strongholds of Mistworld and Virimonde to the Empire's mighty heart on the planet of Golgotha, the fate of humanity now depends on a clash of arms across light-years of space!