Book outline generator
Positioning, reader personas, title candidates and an outline built from proven nonfiction frameworks — with word budgets, dependencies and an argument map.
AI book writing software for nonfiction authors
Write a nonfiction book that holds up — with an AI that cites, not invents.
Mirabilis takes a business book, memoir, textbook or guide from idea to print: an outline generator, a research library where every claim is linked to real evidence, an AI writing partner trained on your own voice, editorial review, and export to Word, EPUB and print PDF for Amazon KDP and IngramSpark.
- Free plan, no card needed
- Your sources, your voice, your decisions
- Every AI change is a suggestion you can undo
Everything a nonfiction book needs, in one workspace
From the first idea to the file you upload to your publisher, each step keeps the evidence attached to the words.
Research library with verified citations
Import PDFs, web pages, video transcripts, notes and interviews. Every quote the AI uses is checked against the stored source before it can become evidence.
Evidence graph and claim tracking
Every factual sentence links to the passage that supports it. Coverage per chapter, conflicting sources surfaced before you draft, research gaps and interview questions.
AI drafting in your own voice
A voice profile learned from your writing, drafts from approved sources only, unsupported sentences marked, and a naturalness pass that removes machine-writing habits.
Collaborative manuscript editor
Real-time co-writing, suggestions with diff and rationale, accept / revise / undo on every AI change, comments, locks, snapshots and paragraph-level restore.
Publish to KDP and IngramSpark
Export Word, EPUB 3 and print-ready PDF with trim sizes, gutters and typography you control; ISBN barcodes and KDP metadata help.
How to write a nonfiction book with Mirabilis
- 1
Define the reader and the thesis
Tell Mirabilis who the book is for and what it argues; get positioning, personas and title options you can edit.
- 2
Collect and approve evidence
Upload sources, read them with highlights, and approve what may be cited. The library becomes the only thing the AI can quote.
- 3
Generate and shape the outline
Pick a structure, set word budgets and required claims per chapter, and see where the evidence is thin before writing.
- 4
Draft, review, publish
Draft each section in your voice from the outline and the Bible, accept or revise suggestions, run editorial review, export.
Built for authors who are accountable for what they publish
No invented sources. The AI can only cite passages that exist in your library; quotes are verified against the stored text, and anything unsupported is labelled “needs citation”.
Your voice, honestly. The naturalness pass removes the vocabulary and rhythms readers recognise as machine writing while keeping every fact. We report our own score and never promise a text is undetectable.
Costs you can see. An estimate before every generation, a cap on every job, and a monthly allowance on each plan.
Frequently asked questions
- Does Mirabilis write the book for me?
- It drafts with you, not instead of you. Every section is written from your outline, your Book Bible and sources you have approved; unsupported sentences are marked, and every AI change arrives as a suggestion you accept, revise or reject.
- How does Mirabilis avoid made-up facts and citations?
- Claims are linked to exact passages in your research library, quotes are verified against the stored source text, and sentences without evidence are labelled “needs citation” rather than passed off as fact.
- Will the book sound like me?
- You train a voice profile from your own writing, tune dials for formality, warmth, sentence length and more, and run a naturalness pass that removes machine-writing habits while keeping every fact.
- Which formats can I export?
- Word (DOCX) with typography, trim size and gutter settings, EPUB 3, print-ready PDF, Markdown and HTML, with presets for Amazon KDP and IngramSpark.
- Can I import my research?
- Yes: PDFs, Word and Excel files, web pages with archival snapshots, YouTube and Vimeo transcripts, audio and video, notes and interview transcripts, plus Zotero, Dropbox, Notion, Google Drive and OneDrive.
- Is there a free plan?
- Yes. The Free plan lets you start one book; Author, Studio and Publisher plans add more books, collaborators and a larger monthly AI allowance, billed monthly or annually with a discount.
Start your book today
Free plan includes one book, the outline generator and the research library.