The Defenders

From the back cover of the Warner first edition: "Battle of the center of the galaxy - With its defenses gutted by craven appeasers, the Empire is helpless when the treacherous League of Dark Stars launches its interstellar blitz. Whole systems and sectors are engulfed as the tyrant Triannic's hyperspace invaders mass against Avalon, the star cluster and Imperial capital at the galactic core. Here the Helmsman Wilf Brim, waits at ground zero. Here Brim and young Emperor Onrad must rally the surviving Imperial Starfuries for a desperate counterattack. And here Wilf Brim must lead his exhausted, outnumbered warriors in a hellfire suicidal space battle - if he is to save Avalon and the Empire from total annihilation..."