Exodus: The Helium Sea
| Author | Peter F. Hamilton |
|---|---|
| Illustrator | |
| Language | English |
| Genre |
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| Publisher | Random House Worlds |
Publication date | June 16, 2026 |
| Pages | 752 |
| ISBN | 9780593357699 Search this book on  . |
| Preceded by | Exodus: The Archimedes Engine |
Exodus: The Helium Sea is a science fiction novel by British author Peter F. Hamilton, published on June 16, 2026, by Random House Worlds. Set in the distant future, it is the direct sequel to Exodus: The Archimedes Engine and concludes the Exodus duology. The novel continues to explore humanity's struggle for survival and independence against the advanced transhuman species known as Celestials in the Centauri Cluster, as an exiled faction returns from beyond the Helium Sea to claim vengeance.
The book serves as the final narrative prequel to the upcoming sci-fi action-adventure role-playing game Exodus, developed by Archetype Entertainment, a division of Wizards of the Coast. An audiobook version, narrated by John Lee, was released simultaneously.
Plot
Four thousand years prior to the main events, the Crown Dominion invades Kelowan to halt Queen Zuberi-Dulcina's "Evolution Project"—a radical plan to genetically evolve Imperial Celestials into an army capable of overthrowing the god-like Elohim. Before her execution, Zuberi transfers her mind to Princess Khepri. Khepri escapes into exile aboard a stealthed ship alongside Zuberi's loyalists: Liliana, Dagon, and the archon Iuntin.
In the present, following the catastrophic collision between Boksrock and Kelowan, the human arkship Diligent flees through a Gate of Heaven to Capo Frois. To clear humanity's name, Finn Jalgori-Tobu broadcasts "The Sibling Plea" across the system. He reveals that the rebel leader Gyvoy Enfoe is actually a Celestial archon who used neural compulsion to force Finn to alter the Archimedes Engine's trajectory. In the Kelowan system, the newly elevated Empress Helena-Thyra manages the resulting refugee crisis. Secretly, Thyra is aligned with her father Bekket and Iuntin, using the disaster and the assassination of a rival queen to consolidate power, annex Capo Frois, and pave the way for Khepri's ascendance.
Meanwhile, Josias Aponi realizes he is being held captive aboard the stealthed Traveler ship Arcadia's Moon by Gyvoy (revealed to be Dagon) and Liliana, who are transporting three thousand tons of stolen antimatter. Utilizing illicit network routines, Josias hacks the ship's systems, forces Gyvoy into an escape pod, and ejects him. Josias then uses his control over the antimatter confinement codes to negotiate an alliance with the ship's captain, Andino.
Terence Wilson-Fletcher, accompanied by his family and the assassin Medusa, pursues the Diligent in the advanced ship Aeacus to rescue his son, Aljan. During the voyage, Terence and his wife receive advanced regenerative medical upgrades from the ship's pods. Recognizing they cannot fight the Crown Dominion's pursuing Squadron Twenty-Three alone, Terence forms an alliance with the Celestial archons Olomo and Sahdiah. Together, they ambush the squadron. A surviving frigate commander, Radwarno-Werkas, uses a stasis technique known as the "unlife" to survive the ambush and attempts a high-gee suicide strike on the Diligent. She is ultimately destroyed by a rare Remnant Era Q-distort weapon fired by the arriving Arcadia's Moon.
Reunited aboard the Diligent, the surviving human factions pool their intelligence and realize Liliana is heading to the Hoa Quinzu system to acquire a devastating atmospheric weapon known as the Crystal Gun. To survive the escalating Great Game, the group divides their forces across multiple fronts. Terence, Jimena, and Medusa depart for Hoa Quinzu in the Aeacus to intercept Liliana and prevent her from securing the Remnant Era weapon. Captain Dejean and the Diligent set a course for the JK67b system, intending to trade a portion of their stolen antimatter with outcast Cosmoids in exchange for vital defensive and structural upgrades to the arkship. Simultaneously, Josias, Finn, and Ellie travel to the loOx world of Janton-Io to follow up on a mysterious message Josias received from a rumored Elohim archon. Aided by the Abisqu Celestial Wybul, they evade Imperial bounty hunters and hire a local guide to take them across a vast waterprairie to find the Elohim agent. Concurrently, on the planet Uixic, Makaio-Faraji's son Neusch uses a biological android to covertly investigate the disappearance of his allies, uncovering hidden naval platforms and a web of espionage surrounding the refugee expansion zones.
Characters
The Human Factions
- Finbar (Finn) Charles Louis Griffin Jalgori-Tobu - A central figure grappling with the trauma of being manipulated into destroying Kelowan while striving to protect his family and clear humanity's name.
- Otylia Roasmund Silkie Jalgori-Tobu - Finn's twin sister, who utilizes her political acumen to help navigate the arkship Diligent through hostile territory.
- Zelinda Maryann Richelle Jalgori-Tobu - Finn's older sister, who supports her siblings and aids in the command of the Diligent.
- Josias Matthew Aponi - Otylia's ex-husband and the famous "Man Who Walked on Old Earth," who demonstrates his cunning by hacking the Arcadia's Moon to take control of its antimatter payload.
- Eleanor (Ellie) Faith Aponi - Josias's granddaughter, who remains fiercely loyal to Finn and accompanies him on the perilous mission to Janton-Io.
- Terence Wilson-Fletcher - A human detective now commanding the advanced Celestial ship Aeacus, who undergoes age-reversing genetic regeneration to better protect his family and uncover the truth behind the Great Game.
- Jimena - Terence's wife, who also receives regenerative medical upgrades and assists in the pursuit of their son.
- Vanilda - Terence and Jimena's daughter, who insists on joining her parents in their dangerous pursuit.
- Medusa - A ruthless assassin who acts as a reluctant tactical ally and informant for Terence's crew.
The Exiled Celestials
- Khepri - The Queen in Exile who carries the mindline of the executed Queen Zuberi-Dulcina, destined to lead an evolved army of Archangel Knights against the Elohim.
- Dagon - One of Zuberi's spawn who operates under the human guise of the rebel leader Gyvoy Enfoe to orchestrate the destruction of Kelowan and secure antimatter for Khepri's forces.
- Countess Liliana - Dagon's spawn-sibling and the brilliant bioscience director behind the ancient Evolution Project, who travels to Hoa Quinzu to secure the devastating Remnant Era weapon known as the Crystal Gun.
Imperial Celestials, Archons, and Travelers
- Helena-Thyra - The newly elevated Eternal Empress of the Crown Dominion, who secretly exploits the planetary crisis to consolidate power and annex Capo Frois.
- Bekket - Thyra's father, who secretly collaborates with her and Iuntin to orchestrate political maneuvers within the dominion.
- Iuntin - An ancient chief archon aligned with Thyra and Bekket, assisting in paving the way for Khepri's ascendance.
- Olomo - The Heresy Dominion archon who provides crucial tactical support and intelligence to the human factions.
- Sahdiah - A Talloch Te archon housed in a leathery environment suit, who acts as a strategic ally to Terence and the crew of the Aeacus.
- Neusch - The son of the assassinated archon Makaio-Faraji, who conducts his own espionage on Uixic using a biological android named Halvin-Aneil to uncover naval secrets.
- Wybul - A massive Abisqu Celestial residing in a decaying tower on Janton-Io, serving as an information broker to aid Josias and Finn's search for an Elohim agent.
- Captain Andino - The Traveler captain of the Arcadia's Moon, who shifts her mercenary allegiances to Josias after he secures the antimatter codes, prioritizing profit over the Celestials' conflict.
References
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