The Durdane series is a trilogy of science fiction books written by Jack Vance between 1971 and 1973, and detail the political and social adventures of Gastel Etzwane on the world Durdane. The trilogy, as a whole, portrays the rise of Gastel Etzwane from common boy, to the The Anome, and finally, as a saviour of his world against the alien Asutra of the third book.
The three books in the trilogy are, in reading order:
The land of Shant on the planet Durdane is ruled by a purposely anonymous dictator called the Anome or Faceless Man. He maintains control by virtue of the torc, a ring of explosive placed around the neck of every adult in Shant.
The Anome is the product of a self-perpetuating, self-selecting dynasty. When one Anome grows old, he chooses his successor, a system hundreds of years old. The reason for this harsh system of government is the extreme individuality of the folk of Shant. They are divided into dozens of different cantons, each with very distinctive customs and laws, united only by a common language. Prior to the ascendancy of the Faceless Man, Shant was plagued by constant civil war and dissension. The Faceless Man not only provides the glue that holds Shant together; he communicates anonymously with the cantonal leaders. Those who lose their heads are largely those who have violated local law.
The protagonist of the trilogy is Gastel Etzwane, the son of a prostitute and an anonymous musician. The first two volumes chronicle his coming of age, his discovery of the identity of his father, his struggles to become a musician himself, the murder of his mother and sister by a race of - literally - inhuman barbarian invaders known as the Roguskhoi, and his struggle for revenge against them. This leads to Etzwane's discovering the identity of the Anome, who, strangely passive, refuses to mobilize the armies of Shant against the aliens. Etzwane is forced to assume the role of Anome himself and, through luck and improvisation, leads an eventually successful struggle against the invader. In response to the social upheaval caused by the war, Etzwane lays down his office, and the torc system is abolished.
In the third and final volume, Etzwane learns - the hard way - that the barbarian invaders were the creation of an alien race known as the Asutra, who designed these caricatures of humanity in a first assay at biological warfare against the peoples of Durdane. Since the Roguskhoi are all males, they can only reproduce by sexual intercourse with human women, and they are insanely lustful. The resulting "imps" have no genetic relationship to the human mother, who is a host only. This process, by design, also renders the woman sterile.