The best AI book writing software: what actually matters
Updated November 2026
There are now dozens of AI writing tools. Most can produce text. Very few can produce a book you'd be proud to sell. Before you pay for any of them, check these eight things.
1. Does it plan the whole book?
A tool built for books should create characters, secrets, a setting and a chapter-by-chapter outline from your idea, and let you edit all of it before writing starts.
2. Does it remember the story?
Look for a story bible or codex that every chapter is written against. Without it, names, timelines and clues drift.
3. Can you control the style?
You should be able to pick a style, name authors whose feel you like, set point of view and tense, and teach it your own voice from a writing sample.
4. Does it fight the "AI sound"?
The biggest complaint readers have about AI books is that they sound machine-made. The best tools edit for it, not just generate. Authora pairs a writer AI with a separate editor AI from a different company, which reads every chapter cold, scores it and rewrites the weak lines.
5. Can it check continuity?
A continuity check that compares chapters against each other catches the mistakes reviewers love to point out.
6. Does it make a cover?
Cover art with your title and author name set properly saves hiring a designer for every book.
7. Does it give you files you can publish?
You want a Kindle-ready EPUB, a print-ready paperback interior, and a full wrap cover with the right spine width. Many tools stop at a text box you have to copy out.
8. Is the pricing clear?
Look for a free trial, a clear monthly allowance and a way to buy extra words without changing plans.
How Authora answers the checklist
| Need | Authora |
|---|---|
| Plans the whole book from one idea | Yes: story bible, characters, secrets and full outline |
| Style control | 13 styles, up to 3 blended, "authors like", point of view, tense, audience, heat level, your own voice |
| Human-sounding editing | Writer AI plus a separate editor AI, line-by-line fixes, "make it sound human" pass |
| Continuity check | Yes |
| "You decide" interactive books | Yes, with branching choices and multiple endings |
| Cover art | Yes, painted and lettered |
| Kindle e-book (EPUB) | Included |
| Paperback interior and wrap cover | Print Pack, $14.99 per book |
| Amazon listing copy | Included |
| Price | Free trial, $19 or $39 a month, word packs from $6 |
Compare Authora directly with Sudowrite, Novelcrafter and ChatGPT.
Questions
What is the best AI for writing a novel?
The best choice is software built for books rather than a general chatbot: it should plan the whole story, keep a story bible, let you control the style, edit for human-sounding prose and export publishable files. Authora was built around those needs.
Is there free AI book writing software?
Authora has a free trial with 10,000 words and no card required, enough to plan a book and write the first chapters.
Try it on your own book
Authora plans, writes and edits your book in the style you choose, then makes the cover, the Kindle e-book and the print-ready paperback. The free trial includes 10,000 words, no card needed.