Unus Liber: AI Book Writer

Turn a memory or idea into characters, a connected plot, and a chapter-by-chapter manuscript with an AI writing partner that keeps you in control.

Unus Liber helps anyone turn a memory, idea, or unfinished draft into a structured story and a complete manuscript—even without formal writing experience.

Start by choosing a genre and book format. A guided AI interview discovers the people, setting, conflict, and feeling at the heart of your idea. Unus Liber then proposes three distinct story directions and builds a connected Story Bible, character profiles, world notes, master plot, and chapter outline.

WRITE ONE CHAPTER AT A TIME

Every chapter has its own AI writing agent. Continue the next scene, expand a moment, strengthen dialogue, or polish the voice without replacing work in other chapters. You can always edit the manuscript directly.

KEEP THE STORY CONNECTED

Plot beats are linked to their chapters. Changes to characters, settings, and plot events can be reviewed across the project so your manuscript stays coherent as it grows.

MAKE IT YOUR BOOK

Choose a trim size, cover, manuscript font, and text size. Save manually or enable one-minute autosave. Preview the finished work as a page-turning book and export your manuscript with the native iOS share sheet.

SUPPORTED FORMATS

• Memoir and autobiography • Essay and personal nonfiction • Literary and general fiction • Romance • Fantasy • Mystery and thriller • Short screenplay • Continue an unfinished draft

YOUR STORY, YOUR DECISION

Unus Liber does not publish your work automatically. Projects are private by default, AI suggestions remain editable, and you decide what to keep, revise, export, or share.

AI output may contain errors and should be reviewed before publication or commercial use.

TERMS OF USE

Apple Standard Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/