Urban fantasy hides a supernatural world inside the ordinary one, and the masquerade is a web of rules: who knows, what is public, what each faction can do. Across a series those rules quietly drift. StoryHelm reads your whole series and builds the bible that keeps the hidden world consistent.
Urban fantasy runs two worlds at once: the real city your reader knows and the supernatural one layered on top of it. Every scene has to hold both true. The masquerade alone is a standing rule set, who is in on the secret, what the mundane public believes, what happens when the veil slips. Carry that across five or six books and the bookkeeping outgrows what any author can hold in their head.
The drift is rarely a single dramatic error. It is a vampire who needed an invitation in Book 1 walking through a door uninvited in Book 4. It is a cop who learns about the magical underworld in Book 2 acting, three books later, like she never did. The reader who has lived in your world since Book 1 remembers the rule you set, and the broken rule is exactly the moment the spell breaks.
StoryHelm reads every book in your series and builds your Canon, the single source of truth for your factions, your recurring cast, your city, and the lore of every power. Because the hidden world spans books, the Series Atlas keeps that Canon shared across the whole series, so a faction allegiance or a power rule set in Book 1 is checked against every later book. World Rules captures the genre’s standing constraints, the masquerade, the thresholds, the costs of magic, what each supernatural type can and cannot do, as explicit rules. Then the Coherence Guardian reads across the series and flags the moment a rule, a faction, a place, or a character’s knowledge contradicts what an earlier book established, with the exact book and chapter, so you decide which version is true.
You write in StoryHelm’s built-in editor, or import finished books, and a multi-agent system powered by Claude reads your whole series, not one book at a time. It builds your Canon and Series Atlas from the prose, holds your masquerade and supernatural rules in World Rules, and lets the Coherence Guardian flag the scene where a rule of the hidden world quietly broke, pointed to the exact book and chapter. The story stays yours: StoryHelm reads and analyzes, it never drafts or rewrites a line of your prose.
It reads your masquerade as rules and facts in your Canon, who is aware, what is public, what is hidden, and flags a later scene that contradicts it, such as a character acting on a secret they were never told. It shows the passages; you decide.
Yes. Factions, their politics, and the rules for each supernatural type live in your Canon and Series Atlas across every book, so an allegiance or a power rule that shifts between books gets flagged.
Geography is tracked like any other canon: distances, neighborhoods, and your invented overlay. The Coherence Guardian flags a place that moves or a route that no longer makes sense across books.
From $14/mo, with the Series tier at $59/mo for unlimited books under one Canon, a 14-day free trial (no card), and a one-time $99 Manuscript Audit.
Import your series and StoryHelm builds your bible from the prose, the masquerade, the factions, the lore, then flags the book where a rule of your hidden world quietly broke.
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