# Babel Nexus Index

> Explore classic books and big ideas in a whole new way — a discovery system for the public domain. A three-floor knowledge graph: 21 science hexagonal galleries on Level I, 24 literature hexagonal galleries on Level II, and 8 wisdom hexagonal galleries on Level III — 53 hexagonal galleries holding 842 primary works (books, papers, and reports, every one in the public domain), plus an AI Oracle (powered by Google Gemini) that answers free-form questions about the Archive. Built in the lineage of Jorge Luis Borges' *Library of Babel*, Vannevar Bush's Memex, and H. G. Wells' *World Brain*.

The Index is a knowledge-graph explorer at https://babelnexus.com, built for students tracing an idea back to its source, researchers mapping how disciplines connect, writers hunting for material, and curious readers — every full text is free to read. Each hexagonal gallery is a thematic shelf; hexagonal galleries are connected by typed edges that descend directly from Bush's "associative trails" idea in *As We May Think* (1945). At the exact center of every hexagonal gallery is a spiral staircase to the next floor — Borges' hexagonal-gallery architecture, made navigable. Visitors can walk the graph, ask the Oracle natural-language questions, build and share their own associative trails, and view every primary source's full text via Project Gutenberg, Internet Archive, or Wikipedia.

Level IV is a separate storefront, not a fourth free archive floor. Its three hexagons are **Annotated Classics** (13 ebook editions), **Illustrated Classics** (15 ebook editions), and **Visual Literature** (7 ebook editions), for 35 editions total. Annotated Classics preserves editorial and scholarly annotation; Illustrated Classics uses pictures to accompany a primarily textual work; Visual Literature covers comics, manga, graphic adaptations, and woodcut or wordless novels in which images are essential to the narrative. Some historical illustrations may themselves be public domain, so the Index does not claim that every illustration or edition is copyrighted. Only verified Bookshop.org purchases are linked, while exact editions still being checked are marked unavailable. Floors I–III remain free of purchase and affiliate links.

Author: Nishan Stepak (https://www.linkedin.com/in/nishanstepak/, nishanbstepak@babelnexus.com).
Operated by Babel Nexus, LLC, a limited liability company registered in New York.
Copyright © 2026 Babel Nexus, LLC. All rights reserved. Prior CC BY 4.0 release is irrevocable for copies distributed during that window.

## Core concepts

- [As We May Think (1945)](https://en.wikipedia.org/wiki/As_We_May_Think): Vannevar Bush's essay proposing the Memex and "associative trails" — the direct ancestor of the Index's edge architecture and Reading Trail Builder.
- [The Library of Babel (1941)](https://en.wikipedia.org/wiki/The_Library_of_Babel): Jorge Luis Borges' fictional infinite library of hexagonal galleries, the namesake and visual inspiration for the hexagonal galleries.
- [World Brain (1936–38)](https://en.wikipedia.org/wiki/World_Brain): H. G. Wells' proposal for a permanent, universally accessible synthesis of human knowledge — the long arc the Index belongs to.

## Level I — The Sciences (21 hexagonal galleries)

- Mathematics — Euclid, Archimedes, Newton, Riemann, Gauss
- Physics — Newton, Faraday, Maxwell, Einstein, Curie
- Astronomy — Galileo, Kepler, Eddington, Clerke
- Chemistry — Lavoisier, Mendeleev, public-domain treatises
- Biology — Darwin, Mendel, Wallace, Linnaeus
- Botany — Linnaeus, Hooker, Mendel
- Earth Science — Lyell, Wegener, Suess
- Ecology — early ecology and biogeography texts
- Oceanography — Challenger expedition reports, Maury
- Medicine — Vesalius, Harvey, Osler, Nightingale
- Natural History — Pliny, Buffon, Humboldt
- Geography and Exploration — Strabo's *Geographica*, Marco Polo, Ibn Battuta, Columbus, Pigafetta on Magellan, Cabeza de Vaca, Hakluyt, Cook, Humboldt, Marsh's *Man and Nature*, Prince Henry the Navigator, Shackleton
- Engineering — Bush's *As We May Think*, Carnot, Edison
- Logic — Aristotle, Boole, Frege, Russell & Whitehead's *Principia Mathematica*
- Philosophy of Science — Bacon, Mill, Whewell, Mach, Poincaré
- Psychology — James, Wundt, Freud (public-domain editions)
- Statistics — Bayes, Quetelet, Galton, Pearson, Fisher (where public domain)
- Economics — Smith, Ricardo, Marx, Mill, Veblen
- Handicraft — Thérèse de Dillmont's *Encyclopedia of Needlework*, Edward Johnston's *Writing & Illuminating, & Lettering*, Butterick's *The Art of Knitting* and *The New Dressmaker*, Jane Gaugain, Miss Lambert, Weldon's *Practical Needlework*, the *Priscilla Crochet Book*, Vinciolo, Vecellio (needlework, knitting, crochet, dressmaking, lettering, and the applied arts — edges to Engineering and Economics)
- Ceramic Arts — Marryat's and Chaffers's histories of pottery and porcelain, Jewitt's *The Ceramic Art of Great Britain*, Hobson's *Chinese Pottery and Porcelain*, Petrie's *Corpus of Prehistoric Pottery* and Richter's *The Craft of Athenian Pottery*, Meteyard's *Life of Josiah Wedgwood*, and the studio manuals of Binns, Cox, White, and Searle (pottery, porcelain, glaze, and the potter's craft — edges to Handicraft, Chemistry, and Engineering)
- Knowledge Itself — Bacon's *Novum Organum*, Locke, d'Alembert's *Encyclopédie* preface, Dewey's classification, Peirce, Wells's *World Brain* (the meta-epistemology shelf, and the bridge to Level II)

Plus a hidden additional hexagonal gallery, **The Crimson Hexagon**, which unlocks after visiting seven hexagonal galleries — a Borges easter egg.

## Level II — Literature & Art (24 hexagonal galleries)

Beneath the sciences sits the literary substrate from which formal knowledge later crystallized. Reach Level II via the spiral staircase on the floor of any Level I hexagonal gallery, or via the dashboard tile.

- Epics — Iliad, Odyssey, Aeneid, Beowulf, Mahabharata, Ramayana, Gilgamesh, Shahnameh, Three Kingdoms, Kalevala, Argonautica, Thebaid, Eddas, Volsung Saga, Táin, Arabian Nights, Dede Korkut
- First Novels — Tale of Genji, Callirhoe, Satyricon, Golden Ass, Kadambari, Don Quixote, Le Morte d'Arthur, Beware the Cat, Oroonoko, Robinson Crusoe, Hayy ibn Yaqdhan
- Wisdom Literature — Maxims of Ptahhotep, Instructions of Shuruppak, Instructions of Amenemhat, The Debate Between Winter and Summer, Poem of the Righteous Sufferer, Story of Aḥikar, Counsels of Wisdom, Instructions of Šūpê-amēli, Instructions of Kagemni, Nig-Nam Nu-Kal
- First Plays — Aeschylus (Persians, Suppliants, Seven Against Thebes), Sophocles (Antigone, Ajax), Euripides (Alcestis, Cyclops), Aristophanes (Acharnians)
- First Mystery Novels and Stories — Voltaire (Zadig), Hoffmann (Mademoiselle de Scudéri), Poe (Murders in the Rue Morgue, Purloined Letter, Mystery of Marie Rogêt), Dickens (Bleak House), Collins (Moonstone, Woman in White), Gaboriau (L'Affaire Lerouge, Monsieur Lecoq), Doyle (A Study in Scarlet), Green (Leavenworth Case), Chesterton (Innocence of Father Brown)
- First Science Fiction and Proto Science Fiction Stories — Lucian (A True Story), Bacon (New Atlantis), Kepler (Somnium), Godwin (Man in the Moone), Cyrano de Bergerac (Moon, Sun), Cavendish (Blazing World), Swift (Gulliver's Travels), Holberg (Niels Klim), Shelley (Frankenstein, The Last Man)
- Fiction Set in Libraries — Irving (Mutability of Literature), Flaubert (Bibliomania), Nodier (Le Bibliomane), Hawthorne (A Virtuoso's Collection), Anatole France (Sylvestre Bonnard, Penguin Island), Henry James (The Aspern Papers), Eugene Field (Love Affairs of a Bibliomaniac), Pearson (Old Librarian's Almanack), M. R. James (Tractate Middoth). In-copyright descendants — Borges' *Library of Babel*, Eco's *Name of the Rose*, Calvino, Ruiz Zafón — are referenced in prose only, never stored as evidence.
- First Romance Novels — Achilles Tatius (Leucippe and Clitophon), Heliodorus (Aethiopica), Longus (Daphnis and Chloe), Xenophon of Ephesus (Ephesian History), Richardson (Pamela), Cao Xueqin (Dream of the Red Chamber), Jane Austen (Sense and Sensibility, Pride and Prejudice), Maria Edgeworth, Charlotte Brontë (Jane Eyre), Georgette Heyer (The Black Moth)
- First Horror Stories and Novels — Pliny the Younger (Athenodorus and the Haunted House), Walpole (Castle of Otranto), Beckford (Vathek), Radcliffe (Mysteries of Udolpho), Lewis (The Monk), Shelley (Frankenstein), Polidori (The Vampyre), Irving (Sleepy Hollow), Maturin (Melmoth), Hugo (Notre-Dame de Paris), Poe (Usher, Tell-Tale Heart, Black Cat, Raven), Le Fanu (Carmilla, Uncle Silas, Green Tea), Stevenson (Jekyll and Hyde), Wilde (Dorian Gray), Stoker (Dracula), Leroux (Phantom of the Opera)
- First Fantasy Literature — Apuleius (The Golden Ass), Arabian Nights, Panchatantra, Boccaccio (Decameron), Malory (Le Morte d'Arthur), Ariosto (Orlando Furioso), Spenser (Faerie Queene), Bunyan (Pilgrim's Progress), Swift (Gulliver's Travels), Fouqué (Undine), Hoffmann (Nutcracker), MacDonald (Phantastes, Princess and the Goblin, Lilith), Carroll (Alice, Looking-Glass), Haggard (King Solomon's Mines, She), Morris (Wolfings, Well at the World's End), Machen (Great God Pan), Chambers (King in Yellow), Baum (Wizard of Oz), Nesbit (Five Children, Phoenix, Amulet), Barrie (Peter Pan), Dunsany (Pegāna, Sword of Welleran, Dreamer's Tales, Book of Wonder, King of Elfland's Daughter), Cabell (Jurgen), Eddison (Worm Ouroboros), Mirrlees (Lud-in-the-Mist)
- Wordless Novels — Freyhold (Tiere), Masereel (Mon Livre d'Heures, Die Stadt), Hermann-Paul (Danse Macabre), Nückel (Destiny), Ward (God's Man), Gross (He Done Her Wrong) — the seven public-domain woodcut and engraving novels in the hexagonal gallery
- Fables — Aesop, the Panchatantra, the Hitopadeśa, the Jātaka tales, La Fontaine, Reynard the Fox, Krylov, Sulkhan-Saba Orbeliani — the beast-tale and the moral
- Fairy Tales & Folktales — Grimm, Andersen, Perrault, Lang’s twelve colored Fairy Books, Jacobs, Yeats, Afanasyev, the Thousand and One Nights, the Panchatantra, Ozaki — the world’s oral tradition in print, across every continent
- Writing Fiction and Poetry — Aristotle (*Poetics*), Horace (*Ars Poetica*), Poe (*The Philosophy of Composition*), Walter Besant, Edith Wharton, Percy Lubbock, Arnold Bennett, Sherwin Cody, William Strunk Jr. (*The Elements of Style*) — the craft and art of composition
- Poetry — Hesiod, classical Japanese poets, Ferdowsi, Hafez, Rumi — the lyric & verse tradition
- Letters and Essays — Cicero (*Letters*), Seneca (*Moral Letters to Lucilius*), Sei Shōnagon (*The Pillow Book*), Montaigne (*Letters*), Francis Bacon (*Essays*), Descartes (*Discourse on Method*), Milton (*Areopagitica*), Charles Lamb (*Letters*), William Hazlitt (*Sketches and Essays*), Nietzsche (*On the Genealogy of Morals*), Emerson (*Letters to a Friend*) — the letter & the essay, reflective prose (every card uses an Internet Archive scan of the work as a representative image)
- Satire — The Satire of the Trades (anon. Egyptian), Aristophanes (The Birds, The Clouds), Lucian (A True History), Horace (Satires, Epistles & Ars Poetica), Rabelais (Gargantua and Pantagruel), Erasmus (The Praise of Folly), Thomas More (Utopia), Swift (Gulliver's Travels), Voltaire (Candide), Mark Twain (A Connecticut Yankee in King Arthur's Court), Ambrose Bierce (The Devil's Dictionary) — irony, vice & the mockery of folly (author portraits where a likeness survives; the anonymous Satire of the Trades uses an Internet Archive scan)
- Charles Dickens — The Pickwick Papers (1837), Oliver Twist (1838), David Copperfield (1850), Bleak House (1853), Hard Times (1854), Little Dorrit (1857), A Tale of Two Cities (1859), Great Expectations (1861) — the Victorian novel & social conscience (edges to First Novels, First Mystery, and Satire)
- William Shakespeare — Romeo and Juliet (1595), A Midsummer Night's Dream (1595), The Merchant of Venice (1596), Much Ado About Nothing (1598), Julius Caesar (1599), Hamlet (1600), Twelfth Night (1601), Othello (1603), King Lear (1606), Macbeth (1606), Shakespeare's Sonnets (1609), The Tempest (1611) — the Elizabethan stage & the English language (edges to First Plays, Poetry, and First Fantasy Literature)
- Adventure Novels — Defoe's Robinson Crusoe (1719), Scott's Ivanhoe (1819), Dumas's The Three Musketeers (1844) and The Count of Monte Cristo (1845), Melville's Moby Dick (1851), Verne's Around the World in Eighty Days (1873), Stevenson's Treasure Island (1883) and Kidnapped (1886), Pyle's The Merry Adventures of Robin Hood (1883), Haggard's King Solomon's Mines (1885), Hope's The Prisoner of Zenda (1894), London's The Call of the Wild (1903) and White Fang (1906), Orczy's The Scarlet Pimpernel (1905), Conan Doyle's The Lost World (1912), Burroughs's Tarzan of the Apes (1912) and The Land That Time Forgot (1918), Sabatini's Scaramouche (1921) — the romance of action & the far horizon (edges to First Novels, Epics, and First Science Fiction)
- Russian Literature — Pushkin's Eugene Onegin (1833), The Queen of Spades (1834), The Captain's Daughter (1836) and The Bronze Horseman (1837), Lermontov's A Hero of Our Time (1840) and The Demon (1842), Gogol's Dead Souls (1842), Goncharov's Oblomov (1859), Turgenev's A Nest of the Gentry (1859) and Fathers and Sons (1862), Dostoevsky's Notes from the Underground (1864), Crime and Punishment (1866), The Idiot (1869) and The Brothers Karamazov (1880), Tolstoy's War and Peace (1869), Anna Karenina (1877), The Death of Ivan Ilyich (1886), Resurrection (1899) and Hadji Murad (1912), Chekhov's Uncle Vanya (1898), Short Stories, and The Cherry Orchard (1904) — the Russian novel & the Golden Age (edges to First Novels, Poetry, and First Plays)
- Visual Art — Vitruvius's De Architectura (c. 15 BCE), Cennini's Il Libro dell'Arte (c. 1400), Dürer's Of the Just Shaping of Letters (1525), Vasari's Lives of the Painters (1550), Leonardo's A Treatise on Painting (1651) and The Notebooks (1883), Bellori (1672), Burke's The Sublime and Beautiful (1757), Diderot's Salons (1765), Lessing's Laocoön (1766), Goethe's Theory of Colours (1810), Chevreul (1839), Ruskin's Modern Painters (1843), The Seven Lamps of Architecture (1849), The Stones of Venice (1851) and The Elements of Drawing (1857), Viollet-le-Duc (1863), Zola's Mon Salon (1866), Blanc's Grammar of Painting (1867), Pater's The Renaissance (1873), Berenson (1896), Van Gogh's Letters (1913), Clive Bell's Art (1914), and Louis Sullivan's The Autobiography of an Idea (1924) — the literature of seeing: art, aesthetics & architecture (edges to Poetry, Letters and Essays, and Writing Fiction and Poetry)
- Women's Literature — Christine de Pizan's The Book of the City of Ladies (1405), Anne Bradstreet's The Tenth Muse (1650), Aphra Behn's Oroonoko (1688), Wollstonecraft's A Vindication of the Rights of Woman (1792), Mary Hays's Female Biography (1803), Austen's Pride and Prejudice (1813), Mary Shelley's Frankenstein (1818), Charlotte Brontë's Jane Eyre and Emily Brontë's Wuthering Heights (1847), Gaskell's North and South (1854), Harriet Jacobs's Incidents in the Life of a Slave Girl (1861), Eliot's Middlemarch (1871), Dickinson's Poems (1890), Ida B. Wells's Southern Horrors (1892), Chopin's The Awakening (1899), Wharton's The House of Mirth (1905), Larsen's Passing (1928), and Woolf's A Room of One's Own (1929) — 34 works
- Classic American Novels — Cooper's The Last of the Mohicans (1826), Hawthorne's The Scarlet Letter (1850), Melville's Moby Dick (1851), Stowe's Uncle Tom's Cabin (1852), Alcott's Little Women (1868), Twain's Tom Sawyer (1876) and Huckleberry Finn (1884), Henry James's The Portrait of a Lady (1881) and The Turn of the Screw (1898), Crane's The Red Badge of Courage (1895), Chopin's The Awakening (1899), Norris's McTeague (1899), Dreiser's Sister Carrie (1900), Wister's The Virginian (1902), London's The Call of the Wild (1903) and White Fang (1906), Wharton's The House of Mirth (1905), Ethan Frome (1911) and The Age of Innocence (1920), Sinclair's The Jungle (1906), Grey's Riders of the Purple Sage (1912), Cather's O Pioneers! (1913), My Ántonia (1918) and Death Comes for the Archbishop (1927), Anderson's Winesburg, Ohio (1919), Lewis's Main Street (1920) and Babbitt (1922), Fitzgerald's The Great Gatsby (1925), Dos Passos's Manhattan Transfer (1925), Hemingway's The Sun Also Rises (1926) and A Farewell to Arms (1929), Faulkner's The Sound and the Fury (1929) and As I Lay Dying (1929), and Steinbeck's Cup of Gold (1929) — a century of the American novel

Cross-level edges connect Wisdom Literature ↔ Knowledge Itself and Philosophy of Science; First Novels and First Plays ↔ Psychology; Epics ↔ Knowledge Itself; Fiction Set in Libraries ↔ Knowledge Itself. The literature floor descends in turn to Level III via the spiral staircase on the floor of each hexagonal gallery.

## Level III — Wisdom (8 hexagonal galleries)

Beneath the literature floor sits the wisdom substrate: the works of philosophy, statecraft, historiography, rhetoric, the world's scriptures, the foundations of law, the classics of strategy and the conduct of war, and the written life — autobiography and confession. Reach Level III via the spiral staircase descending from any Level II hexagonal gallery, or via the dashboard tile.

- Philosophy — Plato, Aristotle, Confucius, Mencius, Laozi, Zhuang Zhou, Epictetus, Marcus Aurelius
- Governance & Society — Aristotle (*Politics*), Cicero, Kautilya (*Arthashastra*), Machiavelli (*The Prince*, *Discourses*)
- History — Herodotus, Thucydides, Polybius, Sima Qian, Tacitus, Ibn Khaldun
- Rhetoric — Aristotle (*Rhetoric*), Cicero (*De Oratore*), Quintilian (*Institutio Oratoria*), Demosthenes (*Public Orations*)
- Religion & Spirituality — the Rigveda, Upanishads, Bhagavad Gita, Dhammapada, Tao Te Ching, Qur'an, Augustine (*Confessions*), Rumi (*Masnavi*), William James (*The Varieties of Religious Experience*)
- Law — the codes of Ur-Nammu & Hammurabi, Solon, the Twelve Tables, Plato (*Laws*), Cicero (*De Legibus*), Justinian (*Corpus Juris Civilis*), Magna Carta, Bracton, Grotius, Hobbes, Locke, Montesquieu, Beccaria, Blackstone, the US Declaration/Constitution/*Federalist*, Bentham, Kent, Maine (*Ancient Law*)
- War & Military Thought — the Battle of Megiddo (the Annals of Thutmose III, from Breasted's *Ancient Records of Egypt*), Sun Tzu (*The Art of War*), Thucydides, Xenophon (*Anabasis*), Caesar (*The Gallic Wars*), Arrian (*Anabasis of Alexander*), Clausewitz (*On War*), Jomini (*The Art of War*)
- Autobiography & Confession — Augustine (*Confessions*), Josephus, Abelard (*Historia Calamitatum*), Cellini, Rousseau (*The Confessions*), Franklin, Gibbon, Frederick Douglass, Thoreau (*Walden*), Harriet Jacobs, Booker T. Washington, Helen Keller

## How the Oracle works

1. The visitor asks a free-form question in the Index UI.
2. The frontend POSTs the question + a snapshot of the Archive metadata to the project's own API server (`/api/oracle/ask`, `/api/oracle/descriptive-index`, `/api/oracle/vindication`).
3. The API server attaches a system prompt and calls Google Gemini's REST API. The Gemini API key lives only on the server; the browser bundle never sees it.
4. Gemini's text answer is returned and rendered. On any failure (no key, API error, offline) the UI falls back to a hand-written passage so the page never collapses.

## Routes

- `/` — Visual Explorer (default hexagonal gallery)
- `/n/<chamber-id>` — Visual Explorer focused on a specific hexagonal gallery (deep-linkable, shareable). Valid IDs include all Level I science hexagonal galleries; the Level II ids: `epics`, `first_novels`, `wisdom_literature`, `first_plays`, `first_mystery`, `first_scifi`, `library_fiction`, `romance_novels`, `first_horror`, `first_fantasy_literature`, `wordless_novels`, `fables`, `fairy_tales`, `writing_fiction_poetry`, `poetry`, `letters_essays`, `satire`, `dickens`, `shakespeare`, `adventure_novels`, `russian_literature`, `visual_art`, `womens_literature`, `classic_american_novels`; and the Level III ids: `philosophy`, `governance_society`, `history`, `rhetoric`, `religion_spirituality`, `law`, `war_military_thought`, `autobiography_confession`.
- `/dashboard` — Dashboard overview
- `/archive` — Knowledge Base: the Level I (sciences) masterlist
- `/literature` — the Level II (literature) masterlist
- `/wisdom` — the Level III (wisdom) masterlist
- `/intelligence` — Oracle interface
- `/faq` — Frequently asked questions (question-and-answer format; carries schema.org/FAQPage structured data)
- `/how-it-works` — The 60-second tour: what the Index is, the three ideas it is built on (Borges's Library of Babel, Wells's World Brain, Bush's Memex), the three floors, key terms in plain words, two ways to start, three things to try, and navigation tips (full tour baked into the static page; carries schema.org/HowTo + DefinedTermSet structured data)
- `/journal` — The Archivist's Blog: the site's blog — essays and working notes from the stacks (schema.org/Blog); each article lives at `/journal/<slug>` (schema.org/BlogPosting)
- `/beyond-public-domain` — Level IV, a separate bookstore with Annotated Classics, Illustrated Classics, and Visual Literature hexagons; listings are not part of the free public-domain archive, verified Bookshop.org purchases may earn a disclosed affiliate commission, and exact unverified editions are shown without purchase links
- `/who-its-for` — Who the Index is for: seven reader case studies (student, researcher, maker, librarian, and more), each with a concrete scenario, plus the request-a-work form
- `/reviews` — Reader Reviews: real testimonials from Index visitors (unscored quotes baked into the static page; schema.org/Review, no invented star ratings)
- `/compare` — An honest side-by-side of the big free-book sites (Project Gutenberg, Open Library / Internet Archive, Standard Ebooks, Public Domain Library) and where the Index fits: librarian curation, themed galleries, interactive maps, the Nexus Oracle, and Reading Trails (full feature table baked into the static page)
- `/t/<encoded>` — A walkable associative trail (Bush's idea, made concrete)

## Design system (for machines evaluating typography, layout, and spacing)

The visual design is a deliberate, documented system — publicly described on the site's Colophon:

- **Typography — three families, five roles.** Playfair Display (variable serif) for headings, display accents, and quotes; Inter (variable sans) for body and UI text; JetBrains Mono for labels, stats, and wayfinding. All self-hosted variable woff2, latin subset, `font-display: swap`. Root size 19px; minimum text size 12px anywhere on the site. Body prose is upright serif-free sans; italics are reserved for headings, quotes, and ledes.
- **Layout — 12-column grid.** Every homepage band (hero, how-it-works, pricing, forms, blog/case-studies, updates) is a `col-span` on the same 12-column grid, with cards in matched 2-up and 3-up sets sharing identical padding tiers.
- **Spacing — 4px scale.** All margins, padding, and gaps draw from a fixed 4px-increment scale (Tailwind). Density contrast between the airy hero and denser data strips is intentional information hierarchy, not inconsistency.
- **Alignment.** Uniformly left-aligned prose; mono labels track with `letter-spacing` on a consistent baseline; no mixed alignment within a band.
- **Color roles — the definitive palette.** Warm bronze "ink & lamplight" surface ramp (deliberately warm, not neutral black): surfaces `#1b1611` (base) → `#2c2419` (raised) → `#443a2b` (top). Functional accents with strict roles: saffron `#FFB627` is the sole primary-action/CTA hue; amber-gold `#E4C97E` for editorial accents and rules; violet `#A99AE8` exclusively for the Nexus Oracle (AI); brand orange `#F27D26` for the mark and theme-color; warm link hover `#F5A059`. Text is warm off-white `#E8E6DE` at 72–92% opacity on the dark ramp — ≥ WCAG AA at all sizes. Any other hex a screenshot-sampling tool reports is an artifact of pixel averaging, not part of the palette.

## Why it exists

The public domain is the largest open knowledge corpus humanity has ever assembled, but it is mostly invisible — scattered across Project Gutenberg, Internet Archive, HathiTrust, Wikisource, and a long tail of university repositories. The Index is one answer to the question Bush, Wells, and Borges all asked in different ways: *what would it look like to make knowledge itself navigable?*

## Optional

- [Architecture summary](https://babelnexus.com/architecture.md): a machine-readable overview of how the Index is built (monorepo shape, data model, the Oracle channel, SEO pipeline).
- [LinkedIn (author)](https://www.linkedin.com/in/nishanstepak/)
- [Open Graph card](https://babelnexus.com/opengraph.jpg)
- [Sitemap](https://babelnexus.com/sitemap.xml)