This the first in the Prelude to Dune series of novels that provide the back story to Frank Herbert's DUNE.
The series consists of:
House Atreides
House Harkonnen
House Corrino
Plot ***Spoilers***
House Atreides
The novel begins on the planet of Arrakis, 35 years before the events of the original novel Dune. The Baron Vladimir Harkonnen has just taken over the governorship of Arrakis (also called Dune) from his younger brother Abulurd, who has allowed spice production to decrease heavily. The Baron sees an opportunity for large profits and begins to store up illegal spice hoards.
On the Imperial Capital planet Kaitain, the young planetologist Pardot Kynes has just arrived from his homeworld of Salusa Secundus for an audience with the Padishah Emperor Elrood Corrino IX. The old Emperor is giving Kynes the mission of going to the only known source of melange, Arrakis, in order to find out how the precious substance is produced. Meanwhile, the Crown Prince Shaddam and his minion Hasimir Fenring are plotting against Elrood. Shaddam is not getting any younger, and it seems that the already 157-year-old Emperor could rule for another 50 years. Shaddam decides to poison his father in order to speed up his succession to the throne.
Duke Paulus Atreides of the planet Caladan is planning on sending his young son and heir Leto to the court of Earl Dominic Vernius on Ix in order to study politics with the Earl's son Rhombur. Leto's mother, the Lady Helena, does not like the idea. Not only is she a very religious woman, but her father is also the Count Richese, who is the main rival of the Earl Vernius.
The Bene Gesserit are getting closer to their quest to breed the Kwisatz Haderach; only three generations remain. The next step is to send the Reverend Mother Gaius Helen Mohiam to Giedi Prime, the Harkonnen home world, in order to conceive a child with the Baron Vladimir. This child would in turn be married to Leto Atreides to produce the eventual mother of the Kwisatz Haderach. The Baron is initially not interested, but after being blackmailed with the secret of his spice hoards, he has sex with Mohiam and a daughter is conceived.
Meanwhile, the young Harkonnen slave boy no. 11368, Duncan Idaho, is trying to escape the forests of Giedi Prime, where the na-baron Glossu Rabban is trying to kill him as a part of a game he and his friends are playing. Duncan finally manages to escape the planet, boarding a heighliner en route to Caladan.
Pardot Kynes arrives on Arrakis and begins his duties there. He starts to dislike the Harkonnen rule there, and is getting more and more interested in the native Fremen of the desert and the possibility of terraforming the planet. Pardot is discovering more and more proof that some time, long ago, Arrakis was covered with giant oceans, and gets curious about what changed the climate to what it is today.
Leto finds himself at home at the Earl's home at the Grand Palais of Ix. Not only has he found an equal in Prince Rhombur, but he has also fallen in love with the Earl's daughter, Kailea. But all is not perfect on the planet Ix. The suboids building the heighliners in the depths of the cave cities of Ix are becoming more unsatisfied with their living conditions and the blasphemy of their work.
Emperor Elrood himself is beginning to show signs of senility from the slow-acting poison Fenring had administered. A Tleilaxu delegation arrives and they begin discussing the possibility of producing melange in laboratories; Elrood becomes very interested in this "Project Amal". The Tleilaxu have one demand in exchange for allowing the Emperor to invest in the project: he must give them military support in their takeover of the planet Ix, which they claim has the technological and industrial resources necessary for their experiments. The Emperor, who is already feuding with the Earl of Ix, is willing to give them a hand.
After saving three Fremen youths in the desert from Harkonnen troops, Pardot is taken to a Fremen sietch. The leaders (naibs) decide after a long debate to execute him. But as the chosen assassin encounters Pardot and hears about his plans for a possible terraformation of the planet and the hope this vision gives, the would-be assassin kills himself instead. Seen as a sign, the Fremen name Pardot a prophet. Pardot stays with the Fremen, marries a Fremen woman and together they have a son named Liet.
The Harkonnen offspring born on Wallach IX is not at all what the Bene Gesserit were expecting, and is too weak to produce the mother of the Kwisatz Haderach. They have no other choice but to go back to Giedi Prime to blackmail the Baron for another Harkonnen daughter. The Baron is ready for them and impregnates Mohiam through a violent rape. Mohiam avenges the assault by giving the Baron an incurable disease which over time will make the Baron obese, destroying his beautiful body.
Ix is suddenly attacked by a joint Tleilaxu/Sardaukar army. Leto, Rhombur and Kailea manage to escape in the nick of time and make it back to the Atreides homeworld of Caladan. To divert attention away from the children, Earl and Lady Vernius disappear into obscurity, becoming renegades from the Imperium. The Tleilaxu establish a new government on Ix, renaming the planet Xuttuh.
Leto and the Vernius heirs are welcomed on Caladan by Duke Paulus. Lady Helena, however, is bitterly opposed to giving the Ixian children sanctuary due to her hatred of House Vernius and her belief that Ixian technology is blasphemous for having violated the most sacred commandment that arose from the Butlerian Jihad: Thou shall not build a machine in the likeness of the human mind. She begins plotting against her husband, the Old Duke. Meanwhile, the young Idaho has reached the grand Ducal Capital of Cala City on the West Continent. After an audience with the Duke Paulus, the boy is welcomed in his Court to work in the stable.
Back at Wallach IX, another Harkonnen daughter is born. She is given the name Jessica, meaning wealth in an ancient language. She is to be the grandmother of the Kwisatz Haderach if the breeding program goes as planned.
One evening at a bullfight, the Duke's favorite game, the Old Duke is killed by a drugged Salusan bull. Duncan is accused as a Harkonnen spy of having drugged the bull. Leto knows of course that it is his own mother, Helena, who was behind the assassination, and sends her to the monastery of The Sisters In Isolation on the Eastern Continent to avoid gossip. Leto becomes the new Duke Atreides.
On the other side of the galaxy, the Padishah Emperor Elrood IX has died. Shaddam has finally reached the Golden Lion Throne and is soon to be crowned Padishah Emperor Shaddam Corrino IV of the Known Universe. He plans a grand coronation ceremony on Kaitain and invites nobles from across the Imperium, among them the new Duke Leto and his guests the Vernius heirs, but also Baron Vladimir Harkonnen.
The Baron, however, has a plan. A Richese scientist in his service has just discovered a new function of the Holtzman effect that can make a ship totally invisible, and undetectable by sensors. With this new technology, the Baron sends his nephew Glossu Rabban to attack a Tleilaxu delegation and make it look like an attack from the Atreides. To avoid a disastrous armed confrontation that could spark an interstellar war, Duke Leto opts for a trial by his peers before the Landsdraad council of nobles. This appears, initially, to be a suicidal course as only one noble has ever been acquitted through this procedure in the history of the Imperium.
The Bene Gesserit, however, determine to save Leto as they need him for their breeding program. They provide him with evidence they discovered that suggests some connection between the soon-to-be-crowned Emperor and the Tleilaxu. Leto uses this to blackmail Shaddam. While Shaddam has no interest in the outcome of Leto's trial, he can't risk exposure of his involvement in the takeover of Ix and the artificial spice-production experiments being carried out there. Therefore, he uses his influence to convince the court to summarily find Leto innocent before any testimony is heard. After Shaddam is crowned Emperor, Leto, again uses threat of revealing his knowledge to blackmail Shaddam into granting amnesty for Rhombur and Kailea. Shaddam grudgingly agrees. But, the repeated blackmail attempts begin to breed enmity between him and Leto.
Meanwhile, on Dune, the Fremen are uniting in ways never seen before behind their "Umma" (prophet), Pardot Kynes and his dream of making their home into a lush, green paradise.
House Harkonnen
Eighteen years have passed since Shaddam Corrino IV succeeded his father as Padishah Emperor of the Known Universe. However, his rule is precarious as his wife Anirul has been instructed by her Bene Gesserit sisterhood to bear him only daughters. Shaddam's authority is also challenged by the powerful House Harkonnen, whose illegal stock-piling of melange is of great concern to the Emperor. In order to monopolize the spice, Shaddam and his trusted advisor and friend, Hasimir Fenring, plan to synthesize the substance with the help of Hidar Fen Ajidica, a Tleilaxu Master Researcher. Ajidica sets up laboratories to accomplish this purpose on the newly conquered planet of Ix, formerly the home of House Vernius. By the end of the novel, Ajidica tells Fenring that the manufacture of synthetic spice has been a success, although the validity of his claim is highly dubious.
Meanwhile, on Caladan, Duke Leto Atreides bids Duncan Idaho farewell. Duncan is headed for Ginaz, where he will study to become a swordmaster. Leto and his friends, Kailea and Rhombur Vernius, are still struggling to liberate the siblings' former homeworld, but they have made little progress so far. Kailea becomes Leto's concubine, though he refuses to marry her for obvious political reasons. Rhombur seeks out a companion from the Bene Gesserit order and is matched with a young woman named Tessia who gives him a new sense of drive and purpose. After receiving a plea for help from C'tair Pilru, an Ixian rebel, Rhombur begins supplying the Ixian resistance with limited aid, though his attempts are greatly hindered by the Emperor's Sardaukar. Kailea soon gives birth to Leto's son, Victor. After the child's birth, she becomes increasingly dissatisfied with her role as Leto's concubine, wanting the Duke to marry her so that their son can succeed his father someday. Kailea's lady-in-waiting, Chiara, is actually a Harkonnen agent sent to poison Kailea's mind against Leto.
Matters are complicated further with the arrival of Jessica, a Bene Gesserit and the secret daughter of Reverend Mother Gaius Helen Mohiam and Baron Vladimir Harkonnen (though Jessica herself is unaware of her parentage). Jessica is presented to Leto as a gift from the Bene Gesserit, although the sisterhood has the ulterior motive of using the pair in their breeding program. At first, Leto refuses to have much to do with Jessica and tries to remain faithful to Kailea. However, as he and Kailea grow farther apart, he begins to seek out Jessica's company. Finally, Kailea is driven to make an attempt on Leto's life by having an explosive device planted on his skyclipper. At the last minute, Leto decides to take Victor and Rhombur along with him, and the boy dies instead. Leto is relatively unharmed, but Rhombur is reduced to little more than a charred lump of flesh. Fearing that Leto will guess that she is responsible for the death of their son and driven by guilt, Kailea kills her lady-in-waiting and then commits suicide by jumping out a window. The Tleilaxu offer to grow a ghola of Leto's deceased son in exchange for the barely alive body of Rhombur Vernius. Leto ultimately refuses, after much soul-searching, knowing that the Tleilaxu intend only harm towards House Vernius. Instead, Leto hires Dr. Wellington Yueh, an expert in the field of cybernetics, to fashion a cybernetic replacement body for Rhombur. Leto and Jessica fall deeply in love, leading Jessica to decide to conceive a son for Leto's sake, directly disobeying the Bene Gesserit's order that she have a daughter.
On the Harkonnen homeworld of Giedi Prime, the Baron Harkonnen grows weaker and more corpulent due to a strange disease which, unbeknownst to him, was inflicted upon him by a vengeful Mohiam. After killing a slew of doctors who fail to diagnose or alleviate his condition, he hires Dr. Yueh for a massive price. Yueh reveals to the Baron that Mohiam is responsible for his ailment. In response, the Baron attempts to take revenge against the Bene Gesserit, but fails miserably. Meanwhile, the Baron's brother, Abulurd, uncovers an illegal stockpile of spice on Lankiveil. Rather than turn his brother in to the Emperor, Abulurd, a benevolent ruler and the polar opposite of his brother Vladimir, uses the stockpile to benefit his people. Upon discovery of this, Glossu Rabban, Abulurd's firstborn son, strangles his father to death, an act which earns him the nickname of "Beast." Baron Harkonnen also kidnaps Abulurd's other son, Feyd-Rautha, and tries to raise him as his own.
Young Liet Kynes comes of age and continues the realization of his father Pardot Kynes's dream of taming the hostile conditions on Arrakis. Also on Arrakis, the Lady Margot Fenring seeks out the Fremen in order to explain the disappearance of several other members of the Bene Gesserit order, including the Reverend Mother Ramallo. She finds that the Bene Gesserit have already integrated themselves into Fremen society and implanted the myths of the Missionaria Protectiva into Fremen culture.
Gurney Halleck, a farm laborer on Giedi Prime, witnesses the capture of his sister Bheth at the hands of Harkonnen agents. Halleck fights for his sister's release and is savagely beaten by the Harkonnen. After four years of searching for Bheth, Gurney receives a note from her that tells him she is still alive. A Harkonnen census taker tells Gurney that Bheth paid him to smuggle Gurney's family the note. The man gives Gurney information that leads him to a pleasure house near Mount Ebony. He infiltrates the pleasure house and finds his sister tied to a bed, entwined with two Harkonnen soldiers. Bheth's larynx has been cut out so that she cannot speak. Gurney is again beaten to a pulp by the soldiers, and when he regains consciousness he is in a Harkonnen slave pit, where he is forced to mine and polish obsidian ore. The Harkonnen overseers repeatedly try to break Gurney's spirit through a variety of means: forcing him to watch while his sister is raped and finally murdered, drugging him, and beating him. Gurney finally manages to escape by stowing himself away in a shipment of the ore, which happens to be a gift from Leto Atreides to his concubine Kailea. Gurney leaves the shipment before it arrives at his final destination and joins the renegade Earl Dominic Vernius. After the Earl is killed on Dune, Gurney travels to Caladan to find the Vernius heirs, and swears his loyalty to House Atreides.
House Corrino
One year after the War of Assassins, Duke Leto Atreides sponsors an assault on Ix to reclaim the planet for House Vernius, while his concubine Jessica is pregnant with his son. Emperor Shaddam IV commences his Great Spice War to create a dependency on his soon-to-be-released synthetic melange, ajidamal. The Bene Gesserit eagerly await the birth of the Kwisatz Haderach's mother by Jessica; little do they know that things are not going to turn out exactly how they intend.