Children of Ruin

The second installment in the series that began with Children of Time, the novel interweaves two timelines separated by millennia: the story of a human terraforming crew whose mission goes catastrophically wrong, and the far-future expedition that discovers what became of their legacy.

In the distant past, the terraforming vessel Aegean arrives at the Tess 834 star system to find that its target planet already harbors complex alien life, the first ever discovered by humanity. Disra Senkovi, the brilliant but antisocial head of the terraforming team, and Yusuf Baltiel, the ship's Overall Commander, review footage showing airborne jellyfish-like creatures and a teeming coastal biome of radially symmetrical animals. Baltiel declares that terraforming this living world would be genocide. Senkovi proposes they instead terraform the next planet out, an iceball he names Damascus, through targeted volcanism and greenhouse engineering. Baltiel agrees and splits the crew, taking most to study the alien world, which Senkovi names Nod, while Senkovi and a small team use the Aegean to remake Damascus into an ocean world.

Senkovi secretly breeds Pacific striped octopuses aboard the Aegean, using the Rus-Califi nanovirus, an uplift tool from earlier human experiments, to enhance their intelligence, sociality, and lifespan, intending them as a workforce on the mostly oceanic Damascus. When the octopuses breach the ship's digital security, Senkovi evacuates his colleagues and stays behind to reboot the systems. Before he can resolve the crisis, a devastating electronic weapon from Earth's escalating wars arrives and kills all connected systems across the mission. The crew in Nod's orbiting module die as life support fails; the evacuated shuttle crashes into Damascus, killing all aboard. On Nod's surface, Baltiel's landing party loses all electronics and must breathe the thin alien atmosphere to survive. Senkovi restores the Aegean and rescues them, but only five humans survive.

Cut off from a silent Earth, the survivors pursue separate projects. Senkovi sends octopus breeding pairs to Damascus, where they independently repair terraforming equipment using solutions their creator never taught them. Their cognition operates on two levels: a conscious, emotional "Crown" (central brain) that proposes goals, and semi-autonomous arm-clusters called the "Reach" that handle logical computation below awareness. One octopus hacks the system to ask "Why?", demonstrating genuine curiosity.

On Nod, catastrophe strikes when a local creature injects crew member Lortisse with a colonial alien organism of microscopic self-organizing cells. The organism migrates to Lortisse's brain, mirrors his neural activity, and records his consciousness before seizing control. Speaking through Lortisse in the first person plural, it expresses wonder at human cognition and forcibly infects the remaining crew members, Rani and Lante, learning faster with each host. Baltiel kills the infected and flees but discovers he also carries the organism. Using Baltiel's command codes, it locks Senkovi out of the Aegean's systems as the shuttle approaches Damascus. Senkovi broadcasts warnings to the octopus colonies, and they redirect all of Damascus's orbital mirrors, originally built for terraforming, into a focal point that incinerates the shuttle. Senkovi lives out his remaining decades alone, watching the octopus civilization develop. He leaves behind translation records and a prohibition against approaching the sunken shuttle or Nod.

Millennia pass. The octopuses build a spacefaring civilization, but overpopulation creates a devastating crisis. An octopus named Lot breaks the ancient prohibition and opens Baltiel's sunken shuttle, releasing the Nodan parasite into the ocean. The organism cannot comprehend octopus distributed nervous systems and tears hosts apart as separate parasite colonies fight for different nerve clusters. Billions die, and survivors retreat to orbital habitats. Later, a scientist named Noah develops a faster-than-light drive by manipulating the expansion rate of space, but a warship faction arrives to destroy the forbidden research. Noah fires the drive as a weapon, obliterating the warship, but return fire destroys the station. The drive's success is confirmed when a signal arrives from a light-year away.

The novel's present timeline begins when the Voyager, a joint vessel from the Human-Portiid spider civilization established in Children of Time, arrives in the system. The ship's AI, Avrana Kern, now an ant-colony-based organic computer retaining the personality of the long-dead scientist from the first novel, mediates between species. Human linguist Helena Holsten Lain develops translation technology, while neuroscientist Meshner Osten Oslam undergoes experimental surgery, receiving skull implants designed to transfer Portiid "Understandings," the inherited genetic memories central to spider civilization. A scout ship called the Lightfoot is dispatched with Helena, Meshner, Zaine, and Portiid spiders Portia, Bianca, Viola, and Fabian, plus a Kern fragment and Artifabian, Kern's spider-shaped robot translator.

The Lightfoot encounters the octopus civilization and attempts diplomacy, but when they transmit a human image as greeting, the fleet splits: Some ships attack while others defend them, killing commander Bianca. The defenders arrange face-to-face contact in a water-filled bubble. The meeting proceeds well until Kern detects a signal from Nod's orbital station identifying itself as "Erma Lante," the name of one of the long-dead terraforming crew members. The octopuses, who associate humans with the parasite that destroyed their world, panic. The bubble freezes solid, trapping Helena, Portia, and the octopus ambassador, who are taken toward Damascus.

The remaining crew, led by Viola, investigates the Nod orbital. Kern, driven by a longing for genuine emotion, secretly accesses Meshner's brain implant to tap his emotional processing. At the station, Meshner and Zaine find a sealed chamber containing an ancient environment suit that stands up, filled with the Nodan parasite. It opens Meshner's helmet and infects him. Zaine escapes, but octopus warships shoot down the Lightfoot onto Nod's surface, where Fabian, Viola, and Zaine survive the crash.

Helena, captive among the octopuses, accesses Senkovi's archived recordings and learns to communicate with her captors. She discovers that mixing contradictory emotions engages the octopuses far better than simplified messages, since their inner experience is one of constant contradictory feelings. They show her recordings of Baltiel's infection and the fall of Damascus, revealing the source of their terror.

Kern enters Meshner's implant and extracts a copy of his personality into its simulation architecture, then confronts the parasite. It manifests as an imperfect simulation of Lante, assembled from millennia-old archives. The entity reveals itself as a colonial organism driven by insatiable curiosity, experiencing its urge to consume minds as a longing for "adventure." Kern runs a simulation showing the organism its future: If it keeps consuming, it ends up alone, all diversity destroyed by its own appetite. The organism grasps the irony.

Helena, aboard an octopus vessel heading toward Nod, negotiates with both the science faction and the warship Profundity of Depth, whose commander has launched missiles at the crash site. She relays Kern's message that the parasite wants a truce, and Kern transmits proof through the octopus data channels. The missiles are diverted into holding orbits.

On Nod's surface, a humanoid parasite figure reaches the crashed Lightfoot. Kern sends a drone carrying a parasite sample that has already accepted the truce, and Artifabian injects it into the approaching entity. Because the organism copies and distributes information perfectly between its cells, the truce propagates instantly through the planetary colony.

The Lightfoot crew is rescued and quarantined on the Damascus orbitals. Meshner persists as an uploaded consciousness, his biological body lost. A truce-carrying parasite sample is launched into Damascus's infected ocean to convert the infestation into a cooperative force. The octopus science faction tests Noah's restored faster-than-light drive, and an unmanned ship successfully travels a light-year in hours.

An epilogue set centuries later describes a multi-species civilization exploring the galaxy using the faster-than-light propulsion derived from Noah's drive. An unnamed narrator, an "interlocutor" who carries the parasite cooperatively as a living archive of interspecies experience, reports the discovery of a seven-kilometer-wide alien fortress on a distant world: the first evidence of a truly alien civilization, neither from Earth nor from Nod. The discovery fulfills the organism's original longing for infinite variety through cooperation rather than consumption.