Bob Shaw 
Palace of Eternity [EPUB ebook] 

Shrouded by its shell of drifting lunar fragments, the planet Mnemosyne is a refuge for creative artists and poets, a place isolated from the desperate, losing struggle of the humans against the Syccans.But then COMsac, the Federation’s High Command, come to Mnemosyne, and suddenly the planet is more a military colony than a place for artists.For Mack Taverner, the dilemma is stark: either go along with the brutal military visitation or join the hopeless resitance and become a 'traitor’. His choice has awesome and extraordinary consequenses . . .