The Days of the Golden Moons — J. Naomi Ay

Book 5 of The Two Moons of Rehnor series opens with Senya intent upon conquering the Mother Planet Rozari and forcing them into the Empire whether they want to be or not. His faithful companions, Taner and Berkan wonder if he has truly gone mad and turned into the Evil Emperor after all. In the meantime, Katie makes a final journey to Earth after a ten year detour. Old friends reappear and issues are resolved, including the question that has been asked throughout the series. Or is it?