Terra Ignota

Many different languages are spoken throughout the course of the series. Most dialogue is usually rendered in English, but to indicate other languages, and other mediums of communication, various orthographic conventions are used. For the most part, different quotation marks are used for each language. To represent words spoken in Japanese, corner brackets 「 like this 」 are used, while French and Greek speech receive guillemets « like this ». Inverted question and exclamation marks ¡¿like this?! are used to distinguish speech in Spanish. German receives no special punctuation, but text that is translated from German preserves the rules of noun-capitalization of that language, "so the Text looks like this, with all the Nouns capitalized". Masonic Latin, as well as J.E.D.D. Mason's own variety, is often left untranslated, and italicised, but is usually followed by an English translation in brackets, supplied either by Mycroft or 9A. Despite these being the seven languages that Mycroft speaks, occasionally other languages do appear, and they have their own conventions: for instance, when a character speaks Hindi, the full stop is replaced by the Hindi poorna viraam ("।") (U+0964 "Devanagari Danda"). Set-sets communicate only via text seen through trackers, and their dialogue is enclosed in less-than and greater-than signs, with all text rendered in lower case letters. Other text appearing over trackers is also enclosed in less-than and greater-than signs, but with proper capitalization.

By default, almost all characters use gender-neutral language, with "they/them" the predominant pronoun used. Mycroft, the primary narrator, finds his world's obsession with gender-neutrality oppressive, so often uses gendered pronouns to refer to other characters, assigning genders based on the characters' personalities and roles, as they relate to traditional Western gender roles. For instance, Chagatai is referred to using "she/her" pronouns because of their caring demeanour and role as a domestic cook. The author has explained that Mycroft frequently "misuses" gendered pronouns, just as people in real life often make mistakes when using gender-neutral pronouns.[2] Also, in its chapter at the start of Seven Surrenders, Sniper advises the reader to not "trust the gendered pronouns Mycroft gives people, they all come from Madame".[7]^:23 Mycroft sometimes varies the gendered pronouns he gives characters. For instance, Carlyle is mostly referred to using she/her pronouns starting with Seven Surrenders, whereas in the first book Carlyle is referred to with he/him pronouns.

• The series' title, Terra Ignota, is an alternate form of the archaic topographical term terra incognita (Latin for "unknown land"), once used to denote regions that had not been mapped or documented. Ada Palmer repurposes the term as a new type of international law pleading that is entered by a character during a criminal trial in The Will to Battle. The earliest known use of the term appears in Ptolemy's Geography c. 150 CE, which regained a degree of influence during the Age of Discovery.
• The first novel's title, Too Like the Lightning, is taken from Romeo and Juliet (Act II, Scene 2), and was the original inspiration for the series.[6]
• Seven Surrenders describes the events of the book, in which all seven Hives abdicate part of their autonomy to a central character.
• The Will to Battle is taken from Thomas Hobbes's Leviathan, and describes the state of the world during the novel, before fighting actually begins, but "the Will to contend by Battell is sufficiently known."[8]
• Perhaps the Stars, the title of the fourth book in the series, is also the title of the thirteenth chapter of the first novel, which introduced the Utopian hive to the story.

Set in the year 2454, the novel is a fictional memoir written by Mycroft Canner, a brilliant, infamous, and paroled criminal who often serves the world's most powerful leaders. Mycroft frequents the Saneer-Weeksbooth home, at which an important stolen document has been planted. The mystery of why and by whom serves as a focal point which draws many different characters, vying for global power and peace, into involvement with the family. Meanwhile, Mycroft tries to protect and conceal a child named Bridger, who has the power to make the unreal real.

Carlyle Foster has been assigned as the new sensayer (a professional spiritual guide) of the Saneer-Weeksbooth bash'. He enters their home suddenly and witnesses the death of a living toy soldier, brought to life by Bridger's miracle. Martin Guildbreaker has also arrived at the Saneer-Weeksbooth bash' to investigate a crime: the unpublished Seven-Ten List (ranking the world's ten most influential people) was stolen from the Black Sakura news office and planted in the Saneer-Weeksbooth bash'house as though to frame them for grand theft. Martin meets and interrogates Ockham Saneer, head of the bash'.

Mycroft is summoned to Tōgenkyō by Chief Director Hotaka Andō Mitsubishi. Hotaka and his wife Danaë interrogate Mycroft about the potential use of the "Canner Device" (which allows the user to travel untraced) in the Black Sakura theft.

Mycroft and Censor Vivien Ancelet calculate the economic and cultural impact of this year's publication of the Seven-Ten lists. Vivien recognizes the statistical sequence 33-67; 67-33; 29-71, because his former co-worker Kohaku Mardi wrote it on a wall in his own blood before he died. Mycroft divulges that the statistics predict the tipping point of global destabilization. Mycroft and Vivien agree privately to do anything they can to prevent this catastrophe. The six Hive leaders approve J.E.D.D. Mason to lead the investigation of the crime.

Switching narrators briefly, Martin Guildbreaker dictates his investigation interview, where he begins to learn about the conspicuous suicides and car crashes which have been subtly affecting world politics.

Mycroft returns to the Saneer-Weeksbooth bash' to find Bridger distressed: Dominic Seneschal has found Bridger's cave and confiscated many items. Mycroft wants to hide Bridger somewhere new, away from the bash'house, but Thisbe is suspicious. Carlyle finds out Mycroft is the infamous serial killer Mycroft Canner who tortured, murdered, and ate the seventeen Mardi bash' members years ago. Julia Doria-Pamphili, Mycroft's court-appointed sensayer, arrives. Carlyle and Julia travel together and discuss how Mitsubishi bash' members are now employed in the Censor's Office, European Parliament, the Humanist Praetor's office, the C.F.B., and the Black Sakura.

Saladin, Mycroft's secret lover and accomplice, has found and wants to kill Tully Mardi, the only remaining Mardi. Mycroft asks Saladin to kill Bridger if he is about to be captured.

Thisbe and Carlyle go to Paris to the 'black hole' which Eureka says J.E.D.D. Mason frequents. It turns out to be a secret, Eighteenth-Century era themed, high-security Gendered Sex Club, where they worship J.E.D.D. (Jehovah Epicurus Donatien D'Arouet) Mason as a God. They find out that the world leaders often secretly assemble here, united by Madame D'Arouet and her illegitimate son, J.E.D.D. Mason.

Saladin finds Bridger in distress, takes him to a safe house, and decides to hunt down Dominic Seneschal.

A final interlude by Martin Guildbreaker commences: a consultation with Commissioner General Ektor Papadelias. By examining the pattern of car crashes and Cato Weeksbooth's suicidal episodes, they realize the Saneer-Weeksbooth bash' is carrying out targeted assassinations, ostensibly in order to maintain the world political status quo and prevent war. They debate the kill-dozens-to-save-thousands ethics of pursuing this investigation. If these assassinations are revealed, war may begin.

Seven Surrenders describes the final three days of Mycroft's history of the "seven days of transformation", March 26–29, 2454.

Ockham meets with Ganymede, Andō, and European Prime Minister Casimir Perry, to discuss what steps should be taken in the face of recent events. They propose using O.S., the nickname for the secret system of strategic assassinations that has benefited world peace for the past twelve generations by killing individuals to alleviate economic, social, and political tensions in the world.

Carlyle finds herself lured into a meeting with Dominic, her newly-reassigned sensayer. The session is interrupted by the arrival of the Utopian Voltaire Seldon, who had tracked the activated Canner Device to Dominic's room, and demands its surrender. After breaking her down thoroughly, Dominic convinces Carlyle to work with her to harness Bridger's power for J.E.D.D. Mason. Desperate to preserve Bridger, Mycroft tries to get through to Carlyle, but she switches off her tracker before he can finish.

Mycroft finds Saladin in a cage in Madame's Salon de Versailles, where he had been held after his own capture. Cornel MASON demands an explanation about Apollo Mojave's coat, and the immense number of lethal weapons stored within it. Mycroft reveals that the Mardi bash' had been preparing itself for war, while subtly trying to precipitate a global war, believing that war is inevitable, and it would be better to get it out of the way while they are around to advise on it than to have it later when more advanced technologies would mean greater bloodshed, possibly at the expense of the success of Utopia's Mars terraforming project.

After Sniper's kidnappers return it, the Saneer-Weeksbooth bash' holds a meeting of O.S., to decide whether or not to obey President Ganymede's ordered hit, should it come. Carlyle is discovered hiding and listening in, and Thisbe drags her away. Carlyle confesses that she has been willfully acting as Conclave Head Julia Doria-Pamphili's pawn in her struggle against Danaë Mitsubishi, who herself has also been developing a secret network infiltrating all the Hives.

A Cartesian set-set working on the investigation into O.S., finds themself irresistibly drawn to kill an O.S. target. They beg not to be sent to jail, and after reassurance from Guildbreaker, they reveal the breadth and depth of the impact O.S. Papadelias arrests Julia Doria-Pamphili and the majority of the Saneer-Weeksbooth bash', after Sniper is named the thirteenth O.S.

When Carlyle confronts the Hive leaders gathered at Madame's, Casimir Perry reveals himself to be Merion Kraye, a disgraced European politician who assaulted Danaë and fathered Carlyle. Having arranged for Sniper to be present to broadcast the scene with its ever-present cameras, Perry-Kraye grabs Ganymede and falls through the window that separates Madame's salon from the Flesh Pit, and the scandal of Madame's salon is revealed to the world. Later, J.E.D.D. Mason begins to give a report to the world, confirming the recent scandals and urging reason, but is interrupted by a bullet to the head from a Sniper doll across the Forum, brought to life by Bridger out of fear. Sniper publishes evidence and declares that J.E.D.D. Mason was a threat to the Hive system, since they were set to gain complete control over each Hive, thus erasing the freedom of choice from the system. As Dominic chases the assassin through Romanova, Bridger appears and resurrects J.E.D.D. with a potion before disappearing again.

As the leaderships of the Humanists, Cousins, and Mitsubishi plan reforms to their government and new leaders to take their place, Prime Minister Perry-Kraye gathers as many European officials and Ministers as he can into the Parliament in Brussels, which is then destroyed by missiles.

Mycroft finds Bridger hiding in a closet in the Sniper Doll Museum. He refuses to come out, and apologizes that he can't handle the war that is coming. He puts on the uniform of a World War II soldier, and transforms himself into the Major, who is revealed to be the legendary hero Achilles. Mycroft and Achilles mourn the loss of Bridger, then begin to plan for the war to come.

Following the events of Seven Surrenders, the world is experiencing higher tensions. Mycroft, from a position three months later, narrates how the history presented in the first two volumes was compiled and prepared for release; in contrast, this volume has been written for posterity, rather than public release, so is less closely edited by the Ninth Anonymous (9A). This is marked by several stylistic changes, including the presentation of conversations as simple dialogues, as if in a script. Mycroft's sanity is failing, and he had numerous dialogues with deceased friends, such as several of the Mardi bash' and Apollo Mojave, and with Thomas Hobbes and the reader, some involving the reader speaking directly to Hobbes.

J.E.D.D. Mason decides to take action, as a means of facilitating a dialogue with his peer, the God of this universe. As such, he begins to pursue the unconditional surrender of all hives so that he can remake the world into a place where the assassinations of O.S. are not needed to maintain stability. Opposing him is a faction led by Sniper and Tully Mardi, both in hiding, with the world split in opinion. J.E.D.D. Mason continues to gain power, being revealed as heir to the Masonic throne and being legitimized as the heir to the King of Spain. Several inciting incidents look like they might cause a war, such as riots sparked by a ban on the sale of land to the Mitsubishi, until J.E.D.D. Mason declares his intentions, clarifying the start of the war, and proposes a truce to last until the end of the forthcoming Olympic Games, as was the tradition in Ancient Greece.

Meanwhile, alliances are formed. Achilles, transformed from the toy known as the Major into a human by Bridger's suicide, helps world leaders prepare for war, stockpiling food and increasing medical facilities so that the upcoming war is as humane as it can be. Achilles helps begin the training of Servicers to serve as soldiers and commits to helping Utopia, whom he allies with the Masons.

After being kidnapped by Dominic and Madame in order to make contact with Sniper, an assailant attempts to kill Mycroft and later kidnaps Sniper. Sniper's disappearance is hidden, and they are returned in time for the Olympic Games. The assailant is revealed to supposedly be a surviving Merion Kraye/Casimir Perry, assisted by Croucher.

In order to prevent the destruction of the planet, Utopia destroys all facilities capable of creating Harbingers, weapons capable of great destruction, including viral laboratories and nuclear facilities. They also kidnap all people with the knowledge of how to create them. As this has affected all other Hives, they offer reparations in the form of assets and intellectual property. Furthermore, they give the Hives the means to spy on each other to ensure that no further Harbingers are created.

As war is declared, the Utopian undersea city of Atlantis is attacked, and Mycroft seemingly killed, though he somehow survives. The rest of the narrative is written by 9A, explaining their relation to Mycroft and the following events. The novel ends with the world newly at war.

• Hotaka Andō Mitsubishi: Chief Director of the Mitsubishi Hive, husband of Danaë Marie-Anne de la Trémouïlle
• Ganymede Jean-Louis de la Trémouïlle: President of the Humanist Hive, brother of Danaë Marie-Anne de la Trémouïlle
• The Anonymous: An extremely well-respected political commentator who hides their identity, who controls the Vice President of the Humanist Hive by Proxy
• Cornel MASON: Emperor of the Masons Hive
• Vivien Ancelet: Censor of Romanova, spouse of Bryar Kosala
• Bryar Kosala: Chair of the Cousins Hive, spouse of Vivien Ancelet
• Felix Faust: Headmaster of the Brillist Institute & Gordian Hive, with a playful and sarcastic nature
• King Isabel Carlos II: King of Spain and former Prime Minister of the European Hive
• Casimir Perry: Prime Minister of the European Hive who won the election after the King of Spain withdrew
• Madame D'Arouet: J.E.D.D. Mason's biological mother, madam of the Gendered Sex Club, leader of the secret world leaders' bash'