Dumarest of Terra is a 33-volume series of science fiction novels by Edwin Charles Tubb. Each story is a self-contained adventure, but throughout the series, Earl Dumarest, the protagonist, searches for clues to the location of his home world, Earth.
The stories are set in a far future galactic culture that is fragmented and without any central government. Dumarest was born on Earth, but had stowed away on a spaceship when he was a young boy and was caught. Although a stowaway discovered on a spaceship was typically ejected to space, the captain took pity on the boy and allowed him to work and travel on the ship. When the story opens in The Winds of Gath, Dumarest has traveled so long and so far that he does not know how to return to his home planet and no-one has ever heard of it, other than as a myth or legend.
It becomes clear that someone or something has deliberately concealed Earth's location. The Cyclan, an organization of humans surgically altered to be emotionless (known as Cybers), and on occasion able to link with the brains of previously living Cybers (the better to think logically), seem determined to stop him from finding Earth. Additionally, the Cyclan seeks a scientific discovery that Dumarest possesses, stolen from them and passed to him by a dying thief, which would vastly increase their already considerable power.
Also appearing in many of the books is the humanitarian Church of Universal Brotherhood. Its monks are spread throughout many worlds as are the Cyclan, the two being arch-enemies—which does not make the Church Dumarest's ally, but in some instances they support each other.
Earl Dumarest, the protagonist of the series, is a galactic adventurer, sometime bodyguard, mercenary, gladiator, prospector, hunter, gambler and starship jack of all trades. Dumarest, as he is most often referred to in the books, is on a quest to return to the lost planet of his birth amongst the diverse and disparate worlds of the milky way galaxy. His home planet is Earth. In all of the books the notion of there being a planet called Earth is laughable to most of the people he meets, and for those who have heard the name, it is only as a myth from the deep past often referred to alongside gamblers' paradises such as Jackpot, Bonanza and the mythical El Dorado.
The Cyclan are a widespread organization dedicated to bringing order to the galaxy by means of pure logic. Their primary agents, Cybers, are trained from childhood in countless mental disciplines involving mathematics and reasoning, and are modified at puberty to be unable to experience any emotion. Each Cyber also possesses a biotech implant called "Homochon Elements". These implants enable each Cyber to enter a trance-like state which enables instantaneous communication with the Cyclan central intelligence, even over interstellar distances. This central intelligence is a gestalt organism consisting of the disembodied minds of former Cybers whose mental prowess has been demonstrated to be of value but whose bodies have grown too old to continue functioning. The ultimate reward to which all Cybers aspire is to be incorporated into the central intelligence.
For these reasons, Cybers have an uncanny ability to extrapolate future events from existing data, and are highly prized (and highly paid) as advisors to rulers across the galaxy. The Cyclan publicly insist that they do not command or interfere, they merely advise, and this also increases their credibility among those who seek their service. However, the Cyclan pursue their own agenda, and while they provide valuable service to maintain their reputation, those whom they advise are manipulated even as they are aided. While incapable of malice, the Cyclan are thoroughly ruthless and willing to sacrifice individuals or worlds to their logically derived vision of the greater good. It is irrelevant to them whether or not the mass of humanity still handicapped by emotion shares this vision.
It is implied throughout the series that the Cyclan has something to do with the knowledge of Earth having been lost or destroyed in the distant past, and that they strive to keep that knowledge secret. This hidden agenda puts them at odds with Dumarest from the outset of the series.
The Hausia is a network of information brokers who operate on most worlds that engage in interstellar commerce. With a galactic reputation as fair but shrewd negotiators, and consistently driven by the profit motive, Hausi are neither noble nor malicious. Dumarest frequently deals with them because, as long as a mutually beneficial business arrangement can be reached, their lack of a hidden agenda makes them predictable and generally trustworthy.
The Church of Universal Brotherhood is a decentralized humanitarian organization whose "monks" roam the galaxy giving comfort and alleviating suffering wherever they can. While they do not believe suffering holds intrinsic merit, they refuse to enjoy luxury or privilege of station above what is available to the most lowly of those to whom they minister. Although this appearance is not intended to deceive, it occasionally blinds those who disparage or underestimate them to the fact that each monk is a highly educated, highly trained agent of the central Church.
The Free Traders are small, independently owned and operated merchant starships and their crews. Free traders often invest speculatively in their cargoes in the hope of finding a lucrative market, or carry commissioned cargo and paying passengers when available.
The Terridae is a secretive and paranoid sect that shares Dumarest’s mission: to find Earth. They have been awaiting "The Event" (the discovery of Earth) for thousands of years. As they age, they spend more and more of their lives in self-contained stasis chambers (caskets) - the oldest only awakening for short periods every few decades, to prolong their lifespan until The Event occurs.
The Original People is a mysterious and highly fragmented sect that believes all humanity originated on one world - Earth (also known as Terra). Each faction is highly secretive and does not proselytize, because membership is based on the belief that they are the descendants of the original wave of settlers that spread out into the galaxy from Earth.
The series consists of: