Wave Without a Shore (Alliance-Union Universe)

Freedom was an isolated planet, off the spaceways track and rarely visited by commercial spacers. It wasn't that Freedom was inhospitable as planets go. The problem was that outsiders—tourists and traders—claimed the streets were crowded with mysterious characters in blue robes and with members of an alien species. Native-born humans, however, said that was not the case. There were no such blue-robes and no aliens. Such was the viewpoint of both Herrin the artist and Waden the autocrat—until a crisis of planetary identity forced a life-and-death confrontation between the question of reality and the reality of the question…