SOJEN

Build Captivating Chapter Book Universes for Newsletter Fiction

Create compelling serial fiction with AI-powered world-building. Organize continuing storylines, develop memorable characters, and deliver engaging chapters that keep subscribers coming back for more.

Start Building Your Newsletter Universe

Early Access Code: buildworlds2026

Steps to Success

Create character entities for your recurring cast with detailed profiles, relationships, and development arcs

Develop canon entries for your world's backstory, locations, and key events that inform your narrative

Organize chapters into story arcs with beats for each episode, planning continuing storylines across newsletter editions

Use the AI assistant to brainstorm chapter ideas and maintain consistency, then generate codex documents for reference

Suggested Style Prompt

Use this prompt in Sojen to achieve the perfect style for your creation:

Create a chapter book style with clear, engaging prose that builds anticipation for the next installment. Focus on character-driven moments and cliffhanger endings that keep readers subscribed.

Style Examples

How It Works

SOJEN empowers newsletter creators to build rich chapter book universes through structured world-building and story organization. Create detailed entities for your recurring characters, locations, and concepts. Organize your serial fiction into story arcs that track continuing storylines across multiple chapters. Use the AI assistant to brainstorm plot developments, maintain character consistency, and overcome writer's block. Generate codex documents to keep your universe details organized, and leverage timeline periods to track your story's progression. With SOJEN's world-building engine, you can develop interconnected storylines that create depth and anticipation for your newsletter subscribers.

Recent User Creations

Priya Nair

Priya Nair is a pre-med student and one of the most academically accomplished figures in The Grinders cohort — a first-in-her-family high achiever who has quietly, relentlessly built her entire identity around intellectual excellence. She holds the top rank in her year, a position she guards with a ferocity her peers find equal parts admirable and unsettling. Her crowning achievement, by her own measure, is securing one of the few coveted spots in Professor Crane's elite seminar — a competitive, invitation-only academic space she treats less like a classroom and more like a proving ground. To Priya, that acceptance letter was not just an honor. It was confirmation. Her greatest strength and most significant vulnerability are the same thing: an almost compulsive need to be validated by those she respects. This makes her ferociously loyal to anyone who recognizes her intellect, and quietly devastated by anyone who doesn't. It also makes her susceptible to influence in ways she hasn't yet examined — positioning her, without her awareness, as both Professor Crane's most useful subject and his most dangerous blind spot. Her instincts are sharp. Her trust in authority runs deeper than her instincts. On the surface, Priya is composure itself — color-coded notes, a carefully managed schedule, the curated image of someone who has everything accounted for. But underneath the efficiency is a person running at full speed from the fear of being ordinary. She is brilliant in the truest sense of the word, and the tension between her raw capability and her hunger for external confirmation is the quiet fault line that everything else in her story is building toward.

Dominic Voss

Dominic Voss is a third-generation legacy student and the undisputed social sovereign of The Elites — a position he inherited as naturally as the family name itself. He moves through campus like architecture: structural, inevitable, beautiful in the way old money always is — effortless, slightly cold, like marble warmed just barely by the light. Every door opens before he reaches it. Every room rearranges itself around him. To the campus at large, he is the face of a dynasty, a living emblem of the world The Elites were built to preserve. Beneath the surface, the picture fractures. Dominic carries the particular weight of a family that measures love in outcomes — grades, connections, strategic marriages, curated futures. The pressure is not loud; it hums, constant and low, like something structural about to give. The version of him that The Elites see is polished to a high shine. The version underneath is quieter, more unsteady, a person still searching for what he actually wants in a life that was already decided for him before he arrived. He is, against all expectation — his own most of all — a romantic. Not in the grand, orchestrated way his social world performs. In the private, reluctant, terrifying way of someone who never allowed themselves to want something that couldn't be arranged. Whoever breaks through the marble finds something raw and real and entirely unscripted beneath it. That discovery will cost them both — and may be the only thing that saves him.

Zack Holloway

Zack Holloway is the star wide receiver of the campus athletics program — a figure so central to the school's identity that his face appears on game-day banners and in the daydreams of students who have never spoken a word to him. He moves through campus inside a specific kind of gravity, the kind born not from arrogance but from being too visible for too long. He is warm where others expect coldness, funny where they expect distance — and beneath both, quietly and completely, he is alone in the crowd. He belongs to The Athletes by circumstance and reputation, but he feels the pull of something the locker room has never been able to give him. What almost no one suspects is that Zack applied to this school not for its football program, but for its literature department. He reads philosophy in secret — dog-eared paperbacks tucked beneath playbooks, Camus glowing on a phone screen at the back of team buses. His identity, as the world has assembled it around him, is entirely athletic. One bad knee — one ligament giving way on a third-down cut — stands between who he is and the terrifying, blank silence of who he might become without the sport that has always named him. On campus, Zack occupies a charged and complicated middle space: leveraged by The Elites who see his visibility as social currency, respected at a distance by The Grinders who clock his discipline, and watched quietly by The Underdogs who recognize in him both the dream and the trap. He is a romance waiting to crack someone open — magnetic, layered, running out of room to hide. The question the campus hasn't thought to ask is whether anyone, or anything, might crack him open first.

Celeste Hargrove

Celeste Hargrove is the social chair of The Elites and the most luminous — and lethal — face of their carefully maintained empire. With 200,000 followers and an aesthetic as deliberate as a film set, she is the architect of every curated campus event, every whisper campaign, and every social consequence that ripples through the hierarchy. She moves through campus like a weather system — beautiful, charged, impossible to ignore — translating The Elites' unwritten laws into action with the precision of someone who has studied the game so long she forgot it was supposed to be one. Her influence extends far beyond the clique itself; she sets the social temperature of the entire campus, one post, one invite, and one pointed exclusion at a time. What distinguishes Celeste from those who surround her is not just power but instinct — an almost preternatural ability to read rooms, shift narratives, and dismantle rivals before they've finished forming their strategy. She has never visibly lost a social move, and that flawlessness has become both her armor and her identity. Loyalty within The Elites flows toward her not out of affection but out of a shared understanding that being on Celeste's side is the only viable position on the board. Behind the effortless surface, however, something has begun to fracture: moods she can't trace to their source, evenings that dissolve into soft and unaccountable gaps in memory, and a creeping sensation — late at night, in the quiet after the party ends — that someone else has been moving pieces on a board she thought she alone controlled. In the architecture of campus social life, Celeste is both the foundation and the pressure point. Her vulnerability is not yet visible to those around her, and may not yet be fully legible to herself — but the cracks are widening, and whoever is on the other side of the glass knows exactly where to press. Whether she emerges as the origin of The Elites' most dangerous season or its first casualty remains the question no one dares ask — least of all Celeste herself.

SOJEN

Build Captivating Chapter Book Universes for Newsletter Fiction

Steps to Success

Suggested Style Prompt

Style Examples

How It Works

Features

Brainstorm Ideas

Create Characters Locations & Items

Manage Connections

Create Canon

Generate Media

Character Chat

Comics

Discord

Recent User Creations

Priya Nair

Dominic Voss

Zack Holloway

Celeste Hargrove

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